a) Air core b) Iron core c) Ferrite core d) None of the above Ans: (c)
a) Zero b) very small c) Very large d) Proportional to its reference voltage Ans: (c)
a) Resistance potentiometer b) Deposited film potentiometer c) Kelvins potentiometer d) None of these Ans: (b)
a) Level b) Acceleration c) Speed d) All of these Ans: (d)
a) Strip chart recorders b) Galvanometric recorders c) Potentiometric recorders d) Any of the above Ans: (c)
a) High frequency device b) Low frequency device c) Low frequency device with frequency limit of 10 Hz d) Independent of frequency Ans: (c)
a) High sensitivity b) High sensitivity and independence of lead length c) Low sensitivity d) None of these Ans: (b)
a) As high as possible b) As low as possible c) 10 H d) 1 to 10 H Ans: (b)
a) Very high inductance b) Minimum inductance c) Very low inductance d) 1 to 10 H Ans: (b)
a) Achieve high phase difference between current and voltage b) Keep current and voltage in same phase c) Minimize the reactance of the coil d) Increase the reactance of the coil Ans: (b)