Which one is not an example of adiabatic process ?

A. rapid escape of air from a burst tyre
B. rapid expansion of air
C. conversion of water into ice in refrigerator
D. cloud formation in the atmosphere

In a clinical thermometer the mercury in the capillary tube does not contract once removed from the patient because_______________?

A. Mercury takes a long time to contract
B. The amount of mercury use is very small
C. The capillary tube has a small constriction near the bulb
D. The capillary tube is very narrow

We prefer mercury as a thermometric substance because______________?

A. Over a wide range of temperature its expansion is uniform
B. It does not stick to thermometer glass
C. It opaque to light
D. All of above

Numerical value of Boltzmanns constant is______________?

A. 1.38×10-31JK-1
B. 3.18×10-31JK-1
C. 3.18×10-23JK-1
D. 1.38×10-23JK-1

Metabolism is the name of a process in which energy transformation takes place within______________?

A. Heat engine
B. Human body
C. Atmosphere
D. Laboratory

In a half-wave rectifier the r.m.s. value of the A.C. component of the wave is________________?

A. Equal to D.C. value
B. More than D.C. value
C. Less than D.C. value
D. Zero

In forward bias the width of potential barrier_____________?

A. Increases
B. Decreases
C. Remains same
D. No effect

The electronic circuits which implement the various logic operations are called_____________?

A. Logic gates
B. Boolean algebra
C. Amplifier gain
D. Logic functions

Acceptor and donor impurities donate______________?

A. n-carriers only
B. p-carriers only
C. p-carriers and n-carriers respectively
D. n-carriers and p-carriers respectively

An OP-AMPs can amplify_______________?

A. D.C.
B. A.C.
C. Both A.C. & D.C.
D. None of the above