A. D.C. ammeter hour meter
B. D.C. ammeter
C. D.C. energy meter
D. none of the above
Related Mcqs:
- To avoid the effect of stray magnetic field in A.C. bridges we can use_______________?
A. magnetic screening
B. Wagner earthing device
C. wave filters
D. any of the above - An induction meter can handle current up to_____________?
A. 10 A
B. 30 A
C. 60 A
D. 100 A - The disc of an instrument using eddy current damping should be of________________?
A. conducting and magnetic material
B. non-conducting and magnetic material
C. conducting and non-magnetic material
D. none of the above - A direct current can be measured by________________?
A. a D.C. potentiometer directly
B. a D.C. potentiometer in conjunction with a standard resistance
C. a D.C. potentiometer in conjunction with a volt ratio box
D. none of the above - The pressure coil of a wattmeter should be connected on the supply side of the current coil when______________?
A. load impedance is high
B. load impedance is low
C. supply voltage is low
D. none of the above - For measuring current at high frequency we should use_______________?
A. moving iron instrument
B. electrostatic instrument
C. thermocouple instrument
D. none of the above - If the current in a capacitor leads the voltage by 80°, the loss angle of the capacitor is_________________?
A. 10°
B. 80°
C. 120°
D. 170° - Alternating current is measured by_______________?
A. induction ammeter
B. permanent magnet type ammeter
C. electrostatic ammeter
D. moving iron repulsion type voltmeter - The gravity controlled instrument has crowded scale because current is proportional to________________?
A. balancing weight
B. deflection angle
C. sine of deflection angle - In majority of instruments damping is provided by______________?
A. fluid friction
B. spring
C. eddy currents
D. all of the above
