PHY101- Physics Finalterm Past Paper 2009

FINALTERM  EXAMINATION

Spring 2009

PHY101- Physics (Session - 2)

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Question No: 1    ( Marks: 1 )    - Please choose one

  The number of significant figures in 0.00150 is:

       ► 5

       ► 4

       ► 3

       ► 2

   

Question No: 2    ( Marks: 1 )    - Please choose one

 One revolution is the same as:

2π rad

       ► 1 rad

       ► 57 rad

       ► π/2 rad

       ► π rad

       ► 2π rad

   

Question No: 3    ( Marks: 1 )    - Please choose one

 For a body to be in equilibrium under the combined action of several forces:

       ► all the forces must be applied at the same point

all the forces must be applied at the same point

       ►  all of the forces form pairs of equal and opposite forces

       ► any two of these forces must be balanced by a third force

       ► the sum of the torques about any point must equal zero

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Question No: 4    ( Marks: 1 )    - Please choose one

 A bucket of water is pushed from left to right with increasing speed across a horizontal surface.

Consider the pressure at two points at the same level in the water.

       ►  It is the same

       ► It is higher at the point on the left

       ► It is higher at the point on the right

       ► At first it is higher at the point on the left but as the bucket speeds up it is lower there

   

Question No: 5    ( Marks: 1 )    - Please choose one

 An organ pipe with both ends open is 0.85m long. Assuming that the speed of sound is 340m/s, the frequency of the third harmonic of this pipe is:

       ► A. 200 Hz

       ► B. 300 Hz

       ► C. 400 Hz

       ► D. 600 Hz

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Question No: 6    ( Marks: 1 )    - Please choose one

 Capacitors C1 and C2 are connected in series. The equivalent capacitance is given by

       ► C₁C₂/(C₁ + C₂)

       ► (C₁ + C₂)/C₁C₂

       ► 1/(C₁ + C₂)

       ► C₁/C₂

   

Question No: 7    ( Marks: 1 )    - Please choose one

 If the potential difference across a resistor is doubled:

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       ► only the current is doubled

       ► only the current is halved

       ► only the resistance is doubled

       ► only the resistance is halved

   

Question No: 8    ( Marks: 1 )    - Please choose one

 By using only two resistors, R1 and R2, a student is able to obtain resistances of 3 Ω, 4Ω, 12Ω, and 16 Ω. The values of R1 and R2 (in ohms) are:

       ► 3, 4

       ► 2, 12

       ► 3, 16

       ► 4, 12

   

Question No: 9    ( Marks: 1 )    - Please choose one

 Faraday's law states that an induced emf is proportional to:

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       ► the rate of change of the electric field

       ► the rate of change of the magnetic flux

       ► the rate of change of the electric flux

       ► the rate of change of the magnetic field

   

Question No: 10    ( Marks: 1 )    - Please choose one

 A generator supplies 100V to the primary coil of a transformer. The primary has 50 turns and the secondary has 500 turns. The secondary voltage is:

       ► 1000V

       ► 500V

       ► 250V

       ► 100V

   

Question No: 11    ( Marks: 1 )    - Please choose one

 The wavelength of red light is 700 nm. Its frequency is ____________________.

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       ► 4.30 * 10⁴ Hertz

       ► 4.30 * 10³ Hertz

       ► 4.30 * 10⁵ Hertz

       ► 4.30 * 10² Hertz

   

Question No: 12    ( Marks: 1 )    - Please choose one

 In some movies, you sometimes see an actor looking in a mirror and you can see his face in the mirror. During the filming of this scene, what does the actor see in the mirror?

       ► His face

       ► Your face

       ► The movie camera

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       ► The director's face

   

Question No: 13    ( Marks: 1 )    - Please choose one

 A laser in a compact disc player generates light that has a wavelength of 780 nm in air. The light then enters into the plastic of a CD. If the index of refraction of plastic is 1.55, the speed of this light once enter the plastic is ________.

       ► 3.00 * 10⁸ m/s

       ► 1.94 * 10⁸ m/s

       ► 4.29 * 10⁸ km/h

       ► 3.00 * 10⁸ km/h

   

Question No: 14    ( Marks: 1 )    - Please choose one

 Which of the following electromagnetic radiations has photons with the greatest energy?

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       ► blue light

       ► yellow light

       ► x rays

       ► radio waves

   

Question No: 15    ( Marks: 1 )    - Please choose one

 A virtual image is one:

       ► toward which light rays converge but do not pass through

       ► from which light rays diverge as they pass through

       ► toward which light rays converge and pass through

       ► from which light rays diverge but do not pass through

   

Question No: 16    ( Marks: 1 )    - Please choose one

 What is the unit of magnification factor?

       ► meter.Kelvin

       ► radian.Kelvin

       ► degree.Kelvin

       ► no units

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Question No: 17    ( Marks: 1 )    - Please choose one

 During an adiabatic process an object does 100 J of work and its temperature decreases by 5K. During another process it does 25 J of work and its temperature decreases by 5 K. Its heat capacity for the second process is.

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       ► 20 J/K

       ► 100 J/K

       ► 15 J/K

       ► 5 J/K

   

Question No: 18    ( Marks: 1 )    - Please choose one

 An ideal gas expands into a vacuum in a rigid vessel. As a result there is:

       ►  a change in entropy

       ►  a decrease of internal energy

       ► an increase of pressure

       ►   a change in temperature

   

Question No: 19    ( Marks: 1 )    - Please choose one

 The Stern-Gerlach experiment makes use of:

       ► a strong uniform magnetic field

       ► a strong non-uniform magnetic field

       ► a strong uniform electric field

       ► a strong non-uniform electric field

   

Question No: 20    ( Marks: 1 )    - Please choose one

 A large collection of nuclei are undergoing alpha decay. The rate of decay at any instant is proportional to:

       ► the number of undecayed nuclei present at that instant

       ► the time since the decays started

       ► the time remaining before all have decayed

       ► the half-life of the decay

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Question No: 21    ( Marks: 1 )

 Which weighs more, a liter of ice or a liter of water?

   

Question No: 22    ( Marks: 1 )

 Will the current in a light bulb connected to a 220-V source be greater or less than when the same bulb is connected to 110-V source?

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Question No: 23    ( Marks: 1 )

 How is the wavelength of light related to its frequency?

   

Question No: 24    ( Marks: 1 )

 We don't notice the de Broglie wavelength for a pitched baseball. Is this because

the wavelength is very large or because it is very small?

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Question No: 25    ( Marks: 2 )

 Does every magnet necessarily have a north and south pole? Explain

Question No: 26    ( Marks: 2 )

 In a cool room, a metal or marble table top feels much colder to the touch than does a wood surface even though they are at the same temperature. Why?

   

Question No: 27    ( Marks: 3 )

 If a water wave oscillates up and down three times each second and the distance between wave crests is 2 m, what is its frequency? What is its wavelength? What is its wave speed?

   

Question No: 28    ( Marks: 3 )

 A transformer has N₁ = 350 turns and N₂ = 2 000 turns. If the input voltage is 

v(t) = (170 V) cos  t, what rms voltage is developed across the secondary coil?

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Question No: 29    ( Marks: 3 )

 Why do astronomers looking at distant galaxies talk about looking backward in time?

   

Question No: 30    ( Marks: 3 )

 Some distant astronomical objects, called quasars, are receding from us at half the speed of light (or greater). What is the speed of the light we receive from these quasars?

   

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Question No: 31    ( Marks: 5 )

 Consider a lamp hanging from a chain. What is the tension in the chain?

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Question No: 32    ( Marks: 5 )

 A proton travels with a speed of 3.00 * 10⁶ m/s at an angle of 37.0° with the direction of a magnetic field of 0.300 T in the + y direction. What are (a) the magnitude of the magnetic force on the proton and (b) its acceleration?

   

Question No: 33    ( Marks: 5 )

 1. Light from the Sun takes approximately 8.3 min to reach the Earth. During this time interval the Earth has continued to rotate on its axis. How far is the actual direction of the Sun from its image in the sky?

2. Do all current-carrying conductors emit electromagnetic waves? Explain

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2. Yes all current carrying conductors emit electromagnetic waves, and these are at the right angle of the current passes thorough as right hand rule of Fleming’s explains it.

   

Question No: 34    ( Marks: 5 )

 Explain solar convection zone. What is its other name?

   

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Question No: 35    ( Marks: 10 )

 a) Explain why you can't just open your refrigerator to cool your kitchen on a hot day. Why is it that turning on a room air conditioner will cool down the room but opening a refrigerator door will not?

b) On a humid day, water vapor condenses on a cold surface. During condensation, the entropy of the water(a) in-creases, (b) remains constant, (c) decreases, (d) may decreases or remain unchanged. Give its reason.

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ECO401- Economics Finalterm paper 2009

FINALTERM  EXAMINATION

Spring 2009

ECO401- Economics (Session - 2)

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Question No: 1    ( Marks: 1 )    - Please choose one

 In a free-market economy, the allocation of resources is determined by:

       ► Votes taken by consumers.

       ► A central planning authority.

       ► Consumer preferences.

       ► The level of profits of firms.

   

Question No: 2    ( Marks: 1 )    - Please choose one

 The concave shape of the production possibilities curve for two goods X and Y illustrates:

       ► Increasing opportunity cost for both goods.

       ► Increasing opportunity cost for good X but not for good Y.

       ► Increasing opportunity cost for good Y but not for good X.

       ► Constant opportunity cost for both goods.

   

Question No: 3    ( Marks: 1 )    - Please choose one

 If the quantity demanded of a product is greater than the quantity supplied of a product, then:

       ► There is a shortage of the product.

       ► There is a surplus of the product.

       ► The product is a normal good.

       ► The product is an inferior good.

   

Question No: 4    ( Marks: 1 )    - Please choose one

 The supply curve is upward-sloping because:

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       ► As the price increases, consumers demand less.

       ► As the price increases, suppliers can earn higher levels of profit or justify  higher marginal costs to produce more.

       ► None of the given options.

       ► As the price increases, so do costs.

   

Question No: 5    ( Marks: 1 )    - Please choose one

 When an industry's raw material costs increase, other things remaining the same:

       ► The supply curve shifts to the right.

       ► Output increases regardless of the market price and the supply curve shifts upward.

       ► Output decreases and the market price also decrease.

       ► The supply curve shifts to the left.

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Question No: 6    ( Marks: 1 )    - Please choose one

 When the price of petrol rises by 12%, the quantity of petrol purchased falls by 8%. This shows that the demand for petrol is:

       ► Perfectly elastic.

       ► Unit elastic.

       ► Elastic.

       ► Inelastic.

   

Question No: 7    ( Marks: 1 )    - Please choose one

 Suppose price rises from $15 to $17 and quantity demanded decreases by 20%. We can conclude:

       ► Demand is unitary elastic.

       ► Demand is elastic.

       ► The elasticity of demand is 2.

       ► Total revenue will decrease.

   

Question No: 8    ( Marks: 1 )    - Please choose one

 "Utility" is most closely related to the term:

       ► Useless.

       ► Require.

       ► Necessary.

       ► Satisfaction.

   

Question No: 9    ( Marks: 1 )    - Please choose one

 When the marginal utility of a good is zero, this implies that:

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       ► The consumer would not spend any additional income to buy more of that good.

       ► Consumption of additional units would have positive marginal utility.

       ► Total utility is minimized.

       ► Total utility is also zero.

   

Question No: 10    ( Marks: 1 )    - Please choose one

 When the substitution effect of a lowered price is counteracted by the income effect, the good in question is:

       ► An inferior good.

       ► A substitute good.

       ► An independent good.

       ► A normal good.

   

Question No: 11    ( Marks: 1 )    - Please choose one

 Diminishing marginal returns implies:

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       ► Decreasing marginal costs.

       ► Increasing marginal costs.

       ► Decreasing average variable costs.

       ► Decreasing average fixed costs.

   

Question No: 12    ( Marks: 1 )    - Please choose one

 A graph showing all the combinations of capital and labour available for a given total cost is the:

       ► Budget constraint.

       ► Expenditure set.

       ► Isoquant.

       ► Isocost.

   

Question No: 13    ( Marks: 1 )    - Please choose one

 When an isocost line is just tangent to an isoquant, we know that:

       ► Output is being produced at minimum cost.

       ► Output is not being produced at minimum cost.

       ► The two products are being produced at the medium input cost to the firm.

       ► The two products are being produced at the highest input cost to the firm.

   

Question No: 14    ( Marks: 1 )    - Please choose one

 In order for a taxicab to be operated in New York City, it must have a medallion on its hood. Medallions are expensive but can be resold and are therefore an example of:

       ► A fixed cost.

       ► A variable cost.

       ► An implicit cost.

       ► An opportunity cost.

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Question No: 15    ( Marks: 1 )    - Please choose one

 The good produced by a monopoly:

       ► Has perfect substitutes.

       ► Has no substitutes at all.

       ► Has no close substitutes.

       ► Can be easily duplicated.

   

Question No: 16    ( Marks: 1 )    - Please choose one

 Welfare economics is the branch of economics which deals with:

       ► Positive issues.

       ► Normative issues.

       ► Micro issues.

       ► Macro issues.

   

Question No: 17    ( Marks: 1 )    - Please choose one

 The oligopoly model which predicts that oligopoly prices will tend to be very rigid is the:

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       ► Cournot model.

       ► Cobweb model.

       ► Dominant firm model.

       ► Kinked demand model.

   

Question No: 18    ( Marks: 1 )    - Please choose one

 The kinked demand curve model is based on which of the following assumptions?

       ► Each firm considers its rival's output to be fixed.

       ► Each firm considers its rival's price to be fixed.

       ► Each firm believes rivals will match all price changes.

       ► None of the given options.

   

Question No: 19    ( Marks: 1 )    - Please choose one

 Which of the following is NOT conducive to the successful operation of a cartel?

       ► Market demand for the good is relatively inelastic.

       ► The cartel supplies all of the world's output of the good.

       ► Cartel members have substantial cost advantages over non-member producers.

       ► The supply of non-cartel members is very price elastic.

   

Question No: 20    ( Marks: 1 )    - Please choose one

 Cartels are:

       ► Organizations of independent firms, producing similar products, that work together to raise prices and restrict output.

       ► Organizations of interdependent firms, producing similar products, that work together to raise prices and restrict output.

       ► Organizations of independent firms, producing different products, that work together to raise prices and restrict output.

       ► Considered as part of monopolistic competition.

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Question No: 21    ( Marks: 1 )    - Please choose one

 The marginal revenue product is:

       ► Upward sloping due to the law of demand.

       ► Upward sloping due to the law of marginal utility.

       ► Downward sloping due to the law of diminishing returns.

       ► Downward sloping due to the law of supply.

   

Question No: 22    ( Marks: 1 )    - Please choose one

 A reason why some economists basically ignore the short run is because they believe that the economy:

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       ► Has self-correcting mechanisms.

       ► Can only be graphed with a horizontal curve.

       ► Never needs correction.

       ► None of the given options.

   

Question No: 23    ( Marks: 1 )    - Please choose one

 The long run aggregate supply curve will shift to the right if:

       ► The price level increases.

       ► Factors of production (such as labor and capital) increase.

       ► Expenditures (such as consumption and net exports) increase.

       ► The prices of inputs used to produce goods and services (such as wages and the price of oil) decrease.

   

Question No: 24    ( Marks: 1 )    - Please choose one

 A primary implication of Keynesian economics is:

       ► The best government is the least government.

       ► Flexible wages and prices ensure full employment.

       ► Monetary policy is far superior to fiscal policy.

       ► Business-cycle instability is best corrected through government policies.

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Question No: 25    ( Marks: 1 )    - Please choose one

 The economic analysis most closely related to Say's Law is:

       ► Short-run aggregate market.

       ► Production possibilities.

       ► Imperfect competition.

       ► Circular flow.

   

Question No: 26    ( Marks: 1 )    - Please choose one

 Which of the following is NOT a reason of  downward slope of aggregate demand curve?

       ► The exchange-rate effect.

       ► The wealth effect.

       ► The classical dichotomy / monetary neutrality effects.

       ► The interest-rate effect.

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Question No: 27    ( Marks: 1 )    - Please choose one

 The upward-sloping aggregate supply curve indicates that:

       ► As firms increase their level of output, the cost of producing an extra unit increases.

       ► An increase in aggregate demand causes little, if any increase in real output the economy is operating in the long run.

       ► Any increase in aggregate demand causes the output of producers to fall because the general price level rises.

       ► None of the given options.

   

Question No: 28    ( Marks: 1 )    - Please choose one

 An important difference between the Classical and Keynesian approaches to achieve a macroeconomic equilibrium is that:

       ► Keynesian economists actively promote the use of fiscal policy while the classical economists do not.

       ► Keynesian economists actively promote the use of monetary policy to improve aggregate economic performance while the classical economists do not.

       ► Classical economists believe that monetary policy will certainly affect the level of output while the Keynesians believe that money growth affects only prices.

       ► Classical economists believe that fiscal policy is an effective tool for achieving economic stability while the Keynesians do not.

   

Question No: 29    ( Marks: 1 )    - Please choose one

 According to classical economists, the:

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       ► Aggregate demand curve is downward sloping and the aggregate supply curve is vertical.

       ► Aggregate demand curve is downward sloping and the aggregate supply curve is upward sloping.

       ► Aggregate demand curve is vertical and the aggregate supply curve is upward sloping.

       ► Aggregate demand curve is vertical and the aggregate supply curve is horizontal.

   

Question No: 30    ( Marks: 1 )    - Please choose one

 How many methods are there to measure Gross Domestic Product?

       ► Three.

       ► Four.

       ► Five.

       ► Six.

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Question No: 31    ( Marks: 1 )    - Please choose one

 Which of the following is a flow variable?

       ► The value of the house in which you live.

       ► The balance in your savings account.

       ► Your monthly consumption on food items.

       ► The number of carrots in your refrigerator at the beginning of the month.

   

Question No: 32    ( Marks: 1 )    - Please choose one

 Which of the following is NOT a stock variable?

       ► Government debt.

       ► Capital.

       ► The amount of money held by the public.

       ► Inventory investment.

   

Question No: 33    ( Marks: 1 )    - Please choose one

 Suppose that your income increases from $100,000 to $150,000 and your consumption increases from $80,000 to $120,000. Your Marginal Propensity to Save (MPS) is:

       ► 0.2.

       ► 0.4.

       ► 0.6.

       ► 0.8.

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Question No: 34    ( Marks: 1 )    - Please choose one

 Which of the following plays the key balancing role in making sure that the economy reaches and stays at equilibrium at the potential output level?

       ► Real exchange rate.

       ► The production function.

       ► Real price level.

       ► Real interest rate.

   

Question No: 35    ( Marks: 1 )    - Please choose one

 If injections are less than withdrawals at the full-employment level of income then there arises:

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       ► A deflationary gap.

       ► Hysteresis.

       ► Hyperinflation.

       ► An inflationary gap.

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Question No: 36    ( Marks: 1 )    - Please choose one

 The labour force is made up of:

       ► The number of people employed minus the number of people unemployed.

       ► The number of people employed plus the number of people unemployed.

       ► Just the number of people employed.

       ► The whole population.

   

Question No: 37    ( Marks: 1 )    - Please choose one

 Deflation is:

       ► An increase in the overall level of economic activity.

       ► An increase in the overall price level.

       ► A decrease in the overall level of economic activity.

       ► A decrease in the overall price level.

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Question No: 38    ( Marks: 1 )    - Please choose one

 Which of the following will result if there is a decrease in aggregate demand?

       ► Expansion; inflation.

       ► Recession; deflation.

       ► Expansion; deflation.

       ► Recession; inflation.

   

Question No: 39    ( Marks: 1 )    - Please choose one

 A decrease in the natural rate of unemployment will:

       ► Shift the Phillips curve to the left.

       ► Result in a decrease in the inflation rate along the Phillips curve.

       ► Shift the Phillips curve to the right.

       ► Result in an increase in the inflation rate along the Phillips curve.

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Question No: 40    ( Marks: 1 )    - Please choose one

 The Phillips curve will shift to the right:

       ► If there is a decrease in the expected inflation rate.

       ► If there is an increase in the expected inflation rate.

       ► If there is a decrease in the natural rate of unemployment.

       ► If there is a favorable supply shock.

   

Question No: 41    ( Marks: 1 )    - Please choose one

 If a country has flexible exchange rate and has more rapid inflation rate than other countries, its currency will:

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       ► Appreciate.

       ► Depreciate.

       ► Not effect.

       ► All of the given are possible.

   

Question No: 42    ( Marks: 1 )    - Please choose one

 The nominal exchange rate is defined as the:

       ► Market on which currencies of various nations are traded for one another.

       ► Price of one unit of foriegn good in terms of domestic good.

       ► Price of one unit of foriegn currency in terms of domestic currency.

       ► All of the given options.

   

Question No: 43    ( Marks: 1 )    - Please choose one

 Current account deficit is equal to:

       ► Private sector resource deficit.

       ► Government budget deficit.

       ► Private sector resource deficit + Government budget deficit.

       ► None of the given options.

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Question No: 44    ( Marks: 1 )    - Please choose one

 In the exogenous growth model, if investment exceeds depreciation, the capital stock will ----------- and output will-------------- until the steady state is attained.

       ► Increase; increase.

       ► Increase; decrease.

       ► Decrease; decrease.

       ► Decrease; increase.

   

Question No: 45    ( Marks: 1 )    - Please choose one

 Endogenous growth theory differs in what essential aspect from the Solow theory of economic growth?

       ► Endogenous growth theory is a monetary theory whereas the Solow theory is a real theory.

       ► Endogenous growth theory assumes diminishing returns to capital and the Solow theory assumes constant returns.

       ► In endogenous growth theory, economies with the same technology and saving rate need not converge to the same steady state as in the Solow model.

       ► All of the given options are correct.

   

Question No: 46    ( Marks: 1 )    - Please choose one

 A currency appreciation should:

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       ► Reduce net exports and therefore increase aggregate demand.

       ► Raise net exports and therefore decrease aggregate demand.

       ► Reduce net exports and therefore decrease aggregate demand.

       ► Raise net exports and therefore increase aggregate demand.

   

Question No: 47    ( Marks: 1 )    - Please choose one

 M1 component of money supply consists of:

       ► Paper currency and coins.

       ► Paper currency, coins and check writing deposits.

       ► Paper currency, coins, check writing deposits and savings deposits.

       ► Paper currency, coins, check writing deposits, savings deposits and certificates of deposits.

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Question No: 48    ( Marks: 1 )    - Please choose one

 Commercial banks in Pakistan are supervised by:

       ► State bank.

       ► National bank.

       ► Finance minister.

       ► World bank.

   

Question No: 49    ( Marks: 1 )    - Please choose one

 What would result from a depreciation of the pound on the foreign exchange market? 

       ► An increase in the price of imported computers.

       ► A fall in the purchasing power of US tourists in London.

       ► A fall in the price of imported computers.

       ► An increase in the purchasing power of UK tourists overseas.

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Question No: 50    ( Marks: 1 )    - Please choose one

 An example of hysteresis having a negative effect on a country's economy would be:

       ► Hyperinflation caused by excessive demand.

       ► Nervous investors selling all their shares, causing the stockmarket to crash.

       ► Unemployed workers not taking available jobs.

       ► Women being kept out of jobs traditionally held by men.

   

Question No: 51    ( Marks: 5 )

 Briefly discuss the concept of comparative advantage with the help of example.

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Question No: 52    ( Marks: 10 )

A.      Differentiate between Marginal Propensity to Consume (MPC) and Marginal Propensity to Save (MPS).

B.     Suppose a household has the consumption function (C) presented in the figure given             below:

a.      Find consumption when disposable income is $8,000 and $10,000.

b.      Find consumption when disposable income is $ 6,000. How can a household consume more than its disposable income?

c.       What is true for every point on the 45⁰ line?

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(Marks: 4+6)

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Question No: 53    ( Marks: 10 )

 Define M0 and M1. Briefly discuss the three broad motives of holding money.

(Marks:4+6)

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Question No: 54    ( Marks: 10 )

 Recall the Equation of Quantity theory of money and calculate the missing figure in each of the following cases:

a)      Money supply (M) =100, Price (P) = 3 and real output (Q) = 200. Calculate the missing figure.

b)      Velocity of money (V) = 4, Price (P) = 5 and output (Q) =100. Calculate the missing figure.

c)      Money supply (M) = 200, velocity of money (V) = 7 and output (Q) = 700. Calculate the missing figure.

d)      Money supply (M) =150, velocity of money (V) = 8, Price level (P) = 3. Calculate the missing value.

(Marks: 2.5 each)

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