ENTRANCE TEST – 2009 Multiple Questions and Answers.




16.If a certain force acts on an object and changes its kinetic energy from 65 J to 130 J, then work done by the force will be:
A. 92.5 J
B. 97.5 J
C. 65 J
D. 97.5 J

17.In a certain circuit, if the transistor has a collector current of 10 mA and base current of 50 μA, then the current gain of the transistor is
A. 250
B. 100
C. 150
D. 200

18.A signal that is applied at the inverting input terminal of an op-amplifier undergo amplification, at the output terminal with a phase shift of:
A. 0°
B. 270°
C. 360°
D. 180°

19.If the mass attached with a spring becomes four times, the time period of vibration becomes:
A. One fourth
B. 3/4
C. Half
D. Double

20.In a microwave oven, the wave produced has a wavelength of 12 cm at a frequency of
A. 2452 Hz
B. 2456 Hz
C. 2455 Hz
D. 2450 Hz

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