Q.1

Assertion (A): A universal RLC bridge has a battery and also a high frequency ac source.

Reason (R): RLC bridge uses a Wienbridge arrangement for measuring capacitance.

  • Both A and R are true and R is correct explanation of A
  • Both A and R are true but R is not correct explanation of A
  • A is true R is false
  • A is false R is true
Q.2

A voltage of aboutV dc can be measured

  • directly by dc potentiometer
  • by dc potentiometer in conjunction with a volt ratio box
  • a dc potentiometer in conjunction with a known resistance
  • both (b) and (c)
Q.3

A data signal having frequency components from dc toHz is to be sent through pulse code modulation using an 8 digit code. The minimum carrier channel bandwidth is

  • 1 kHz
  • 2 kHz
  • 4 kHz
  • 8 kHz
Q.4

The power input and output in a device areW andW with each reading in doubt by ±W. The percentage uncertainty in losses is

  • ± 7.55%
  • ± 3.77%
  • ± 11.32%
  • ± 15.09%
Q.5

The coil of a moving iron instrument has a resistance ofΩ and an inductance of 1 H. It readsV when aV dc is applied. If series resistance isΩ, its reading when fed byV,Hz ac will be

  • 260 V
  • 252 V
  • 250 V
  • 248 V
0 h : 0 m : 1 s