Q. Wagner earthing device eliminates

View solution

Q. The deflection sensitivity of a CRO is generally expressed in

View solution

Q. The response of D'Arsonval galvanometer is over damped if

View solution

Q. Assertion (A): The speed of a shaft can be measured by using a dc tacho generator.

Reason (R): A two phase servometer can also be used as a speed transducer.

View solution

Q. A Weston frequency meter is

View solution

Q. The 10 MHz in the specification of CRO means that

View solution

Q. Rayleigh current balance is an absolute instrument.

View solution

Q. If the load current is high, the pressure coil of wattmeter should be connected directly across the load.

View solution

Q. In measurements using CRO, Lissajous patterns are used to

View solution

Q. A dynamometer wattmeter is suitable for both dc and ac.

View solution

Q. If Ey is the voltage applied to Y plates, the vertical deflection of beam is proportional to

View solution

Q. The method of frequency compensation in moving iron voltmeter is

View solution

Q. A moving iron instrument has

View solution

Q. The temperature coefficient of resistance for a thermistor is

View solution

Q. To measure an unknown ac voltage by an ac potentiometer it is desirable that supply for the potentiometer is taken

View solution

Q. A linear displacement digital transducer generally uses

View solution

Q. Two wattmeter method for 3 phase power measurement can be used only for

View solution

Q. A coil resonates at 1 MHz with a resonating capacitance of 72 pF. At 500 pF, resonance is obtained with a resonating capacitor of 360 pF. The self capacitance of coil is

View solution

Q. A peak responding ac voltmeter using a half wave rectifier has been calibrated to read 1 V for 1 V rms sine wave input. If input is 1 V dc the reading will be

View solution

Q. For measuring inductance with high Q, we should use

View solution