A dc potentiometer is designed to measure up to about 2 V with a slide wire of 800 mm. A standard cell of emf 1.18 V obtains balance at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf of the test cell is

A. 1 B. 0.84 C. 0.73 D. 0.65

A. Should be nonmagnetic B. Most be of low temperature coefficient C. Should have low specific resistance D. All of the above

A. The meter is calibrated for AC and it’s error for DC would be high B. The meter does not respond to DC signals C. The error is high due to hysteresis effect D. The error is high due to eddy current effect

A. A shunt resistance B. A series inductance C. Shunt capacitance D. Series resistance