ENTRANCE TEST – 2012 Multiple Questions and Answers.




26.When the length of a simple pendulum is doubled, find the ratio of the new frequency to the old frequency?
A. 1/4
B. 1/2
C. √2
D. 1/√2

27.The ratio of tensile strength to tensile strain is called
A. Modulus of elasticity
B. Bulk Modulus
C. Young’s Modulus
D. Shear Modulus

28.A wire is stretched by a force ‘F’ which causes an extension Δl, the energy stored in the wire is:
A. FΔl
B. 2FΔl
C. ½ FΔl2
D. ½ FΔl

29.H2 and O2 both are at thermal equilibrium at temperature 300 K. Oxygen molecule is 16 times massive than hydrogen. Root mean square speed of hydrogen
A. 4 root mean square of oxygen
B. ¼ root mean square of oxygen
C. 1/16 root mean square of oxygen
D. 1/6 root mean square of oxygen

30.If ‘Q’ is the amount of heat supplied to a system and ‘W’ is the work done, then change in internal energy can be defined as
A. Q/W
B. Q – W
C. W/Q
D. 1 + Q/W

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