A. electrostatic instrument
B. thermocouple instrument
C. moving iron instrument
D. electrodynamic instrument
Related Mcqs:
- In a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter was zero. The power factor of the load must be_______________?
A. unity
B. 0.5
C. 0.3
D. zero - In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load was___________?
A. unity
B. 0.8 lagging
C. 0.8 leading
D. zero - 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 - A dynamometer wattmeter can be used for______________?
A. both D.C. and A.C.
B. D.C. only
C. A.C. only
D. any of the above - An induction wattmeter can be used for_________________?
A. both D.C. and A.C.
B. D.C. only
C. A.C. only
D. any of the above - In a low power factor wattmeter the compensating coil is connected_______________?
A. in series with current coil
B. in parallel with current coil
C. in series with pressure coil
D. in parallel with pressure coil - The resistance in the circuit of the moving coil of a dynamometer wattmeter should be_____________?
A. almost zero
B. low
C. high
D. none of the above - In a low power factor wattmeter the pressure coil is connected_______________?
A. to the supply side of the current coil
B. to the load side of the current coil
C. in any of the two meters at connection
D. none of the above - In a vibrating reed frequency meter the natural frequencies of two adjacent reeds have a difference of_________________?
A. 0.1 Hz
B. 0.25 Hz
C. 0.5 Hz
D. 1.5 Hz - The principle on which vector voltmeter is based is_____________?
A. that it works on the principle of complex variation
B. that it measures the response of linear ramp voltage
C. same as digital meter
D. that it measures the amplitude of a single at two points and at the same time measures their phase difference
