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

 1.5 V.
 1.34 V.
 1.7 V.
 1 V.

ANSWER DOWNLOAD EXAMIANS APP

Measurement and Instrumentation
A Manganin swap resistance is connected in series with a moving coil ammeter consisting of a milli ammeter and a suitable shunt in order to

 Obtaine large deflecting torque.
 Minimize the effect of stray magnetic fields.
  Minimize the effect of temperature variation.
 Reduce the size of the meter.

ANSWER DOWNLOAD EXAMIANS APP

Measurement and Instrumentation
Consider the following statement - 1. The compensating coil of a low power factor wattmeter compensates the effect of the impedance of the current coil. 2. The compensating coil of a low power factor wattmeter compensates the effect of the impedance of the voltage coil circuit.

  1 is false but 2 is true.
 1 is true but 2 is false.
 Both 1 and 2 are false.
 Both 1 and 2 are true.

ANSWER DOWNLOAD EXAMIANS APP