1. A moving iron ammeter coil has few turns of thick wire in order to have:
a) High sensitivity
b) Effective damping
c) Low resistance and large current carrying capacity
d) Large scale
Answer
2. Which of the set of torques is provided in deflection galvanometer:
a) Deflection and controlling
b) Controlling and damping
c) Deflecting and damping
d) Deflecting, controlling and damping
Answer
3. Which of the following is not an absolute instrument:
a) Tangent galvanometer
b) Rayleigh current balance
c) D’Arsonval galvanometer
d) Absolute electrometer
Answer
4. Voltmeter should be of very high resistance so that:
a) Its range is high
b) Its accuracy is high
c) It may draw current minimum possible
d) Its sensitivity is high
Answer
5. The internal resistance for milli ammeter must be very low for:
a)High sensitivity
b) High accuracy
c) Maximum voltage drop across the meter
d) Minimum voltage drop across the meter
Answer
6. Swamping of resistance is used to compensate error due to:
a) Stray magnetic field
b) Temperature variations
c) Large supply variations
d) None of the above
Answer
7.Which of the following instrument can be used for both ac and dc
a) PMMC type
b) Induction type
c) Moving-iron type
d) None of the above
Answer
8. Electrostatic instruments are mainly employed to measure:
a) Heavy currents
b) Low currents
c) Low voltages
d) High voltages
Answer
9. Uniformity in the scale of an ammeter indicates that it is:
a) Rectifier type
b) PMMC type
c) Moving iron type
d) Dynamo-meter type
Answer
10. A Dynamo-meter type watt-meter responds to the:
a) Average value of the active power
b) Average value of the reactive power
c) Peak value of the active power
d) Peak value of the reactive power
Answer
