ENTRANCE TEST – 2012 | Multiple Questions and Answers

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ENTRANCE TEST – 2012 Multiple Questions and Answers.

31.	A heat engine operating according to second law of thermodynamics rejects one fourth of the heat taken from high temperature reservoir. What is the percentage efficiency of heat engine?

	A.	100%
	B.	25%
	C.	50%
	D.	75%

32.	First law of thermodynamics under adiabatic conditions can be mathematically written as:

	A.	Q = W
	B.	Q = ΔU
	C.	Q = U + W
	D.	W = ̶ ΔU

33.	The voltage that is applied across X-plates is provided by a circuit called

	A.	Audio generator
	B.	Time base generator
	C.	Signal generator
	D.	Linear generator

34.	What will be the effect on the capacitance of a capacitor if area of each plate is doubled while separation between the plates is halved?

	A.	Capacitance remains same
	B.	Capacitance becomes double
	C.	Capacitance becomes four times
	D.	Capacitance reduces to half

35.	10 V potential difference is applied across the plate of 1 μF capacitor. What is the energy storied in capacitor?

	A.	0.5 mJ
	B.	0.05 mJ
	C.	5 mJ
	D.	50mJ

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