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
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
3. Which of the following is not an absolute instrument:
a) Tangent galvanometer
b) Rayleigh current balance
c) D'Arsonval galvanometer
d) Absolute electrometer
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
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
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
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
8. Electrostatic instruments are mainly employed to measure:
a) Heavy currents
b) Low currents
c) Low voltages
d) High voltages
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
10. A Dynamometer type wattmeter 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
11. Anderson bridge is used to measure of:
a) Inductance
b) Capacitance
c) Time period
d) Resistance and capacitance
12. Campbell's bridge method is used to measure:
a) Copper loss
b) Iron loss
c) Both iron and copper loss
d) None of the above
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