Electrical Measurement MCQs Part 8

Electrical Engineering MCQ on Electrical Measurements

A permanent magnet moving coil ammeter has a coil resistance of 99 ohm and full scale deflection (FSD) current of 0.1 mA. The shunt resistance is 1 ohm. The current through the meter at 0.5 FSD is

A permanent magnet moving coil ammeter has a coil resistance of 99 ohm and full scale deflection (FSD) current of 0.1 mA. The shunt resistance is 1 ohm. The current through the meter at 0.5 FSD is

1. 0.003 mA
2. 0.05 mA
3. 0.07 mA
4. 1.5mA

Correct answer: 2. 0.05 mA

The chemical effect of current is employed

The chemical effect of current is employed

1. DC ammeter
2. DC ammeter hour meter
3. DC energy meter
4. None of these

Correct answer: 2. DC ammeter hour meter

Some wire- wound resistors have bifilar winding that is used to

Some wire- wound resistors have bifilar winding that is used to

1. Double the power rating of the resistor
2. Increase the thermal stability
3. Reduce the inductance of winding
4. Reduce the tolerance

Correct answer: 3. Reduce the inductance of winding

For which condition the pressure coil of a wattmeter should be connected on the supply side of the current coil

For which condition the pressure coil of a wattmeter should be connected on the supply side of the current coil

1. None of these
2. When load impedance is high
3. Supply voltage is low
4. None of these

Correct answer: 2. When load impedance is high

A resistor of 10 kΩ with 5% tolerance is connected in parallel to a 5 kΩ resistor of 10% tolerance. The tolerance limit for the parallel network is

A resistor of 10 kΩ with 5% tolerance is connected in parallel to a 5 kΩ resistor of 10% tolerance. The tolerance limit for the parallel network is

1. 0.0225
2. 0.0667
3. 0.0833
4. 0.9

Correct answer: 3. 0.0833