A __________ device prevents the oscillation of the moving system and enables the latter to reach its final position quickly___________?

A. Deflecting
B. Controlling
C. Damping
D. Any of the above

Which of the following instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured ?

A. Absolute instruments
B. Indicating instruments
C. Recording instruments
D. Integrating instruments

According to application, instruments are classified as_____________?

A. Switch board
B. Portable
C. Both a. and b.
D. Moving coil

Which of the following essential features is possessed by an indicating instrument ?

A. Deflecting device
B. Controlling device
C. Damping device
D. All of the above

Which of the following properties a damping oil must possess ?

A. must be a good insulator
B. should be non-evaporating
C. should not have corrosive action upon the metal of the vane
D. the viscosity of the oil should not change with the temperature

The output of a particular Op-amp increases 8V in 12µs. The slew rate is_______________?

A. 90 v/μs
B. 0.67 v/μs
C. 1.5 v/μs
D. None of these

Negative feedback_______________?

A. Increases the input and output impedances
B. Increases the input impedance and bandwidth
C. Decreases the output impedance and bandwidth
D. Does not affect impedance or bandwidth

The differential voltage gain of a differential amplifier is equal to RC divided by _______________?

A. R’e
B. R’e/2
C. 2r’e
D. Re

The common-mode voltage gain of a differential amplifier is equal to RC divided by _______________?

A. R’e
B. 2r’e
C. R’e/2
D. 2re

The common-mode voltage gain is________________?

A. Smaller than differentail voltage gain
B. Equal to differential voltage gain
C. Greater than differential voltage gain
D. None of the above