Related Questions

To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken
A From a source which is not the same as the unknown voltage
B From a battery
C From the same source as the unknown voltage
D Any of the above
In an AC co-ordinate potentiometer, the currents in the phase and quadrature potentiometer are adjusted to be
A out of phase by 90°
B out of phase by 60°
C out of phase by 30°
D out of phase by 0°
Rotor rheostat control method of speed control is used for
A Squirrel-cage induction motors only
B Slip ring induction motors only
C Both (A) and (B)
D None of the above
To measure a resistance with the help of a potentiometer it is
A necessary to standardise the potentiometer
B not necessary to standardise the potentiometer
C necessary to use a volt ratio box in conjunction with the potentiometer
D none of the above
In order to achieve high accuracy, the slide wire of a potentiometer should be
A as long as possible
B as short as possible
C neither too small not too large
D very thick
Basically a potentiometer is a device for
A comparing two voltages
B measuring a current
C comparing two currents
D measuring a voltage
E none of the above
A potentiometer may be used for
A measurement of resistance
B measurement of current
C calibration of ammeter
D calibration of voltmeter
E all of the above
A potentiometer is a twoterminal variable resistor.
A True
B False
The stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a
A single-phase winding
B two-phase winding
C three-phase winding
D any of the above
The correct combination of the following groups of sentences.. We must respect live in society We must learn to live in peace. we must respect other's life. We must respect other's property” would be........
A As we live in SOCiety, to respect each other's life and property.
B We live in society to respect peace, life and property.
C In society, we must live to respect other's life and property.
D Our life must be ]peaceful to espect other's property and life.

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