# Electrical Measurements MCQs

Electrical Measurements MCQs

## The strain gauge is a

The strain gauge is a

1. Passive device and converts mechanical displacement into a change of resistance
2. Active device and converts mechanical displacement into a change of resistance
3. Passive device and converts electrical displacement into a change of resistance
4. Active device and converts electrical displacement into a change of resistance

Correct answer: 1. Passive device and converts mechanical displacement into a change of resistance

## The temperature coefficient of resistance for the material of shunt should be

The temperature coefficient of resistance for the material of shunt should be:

1. Negative
2. Positive
3. Negligible
4. None of these

## Electrostatic instruments are used only as

Electrostatic instruments are used only as:

1. Ammeters
2. Voltmeters
3. Both of above
4. Wattmeters

## The watt-hour meter is

The watt-hour meter is:

1. A transmitter device
2. A recorder device
3. An indicating instrument
4. An integrating instrument

Correct answer: 4. An integrating instrument

## When terminals of series ohmmeter are open-circuited the pointer reads

When terminals of series ohmmeter are open-circuited the pointer reads:

1. Zero
2. High value of resistance
3. Infinity
4. None of these

## The resolution of the instrument is defined as the

The resolution of the instrument is defined as the:

1. Maximum quantity it can measure
2. Minimum quantity it can measure
3. Maximum non-linearity
4. None of these

Correct answer: 2. Minimum quantity it can measure

## Which of following is likely to have the largest resistance

Which of following is likely to have the largest resistance:

1. Ammeter of range 1 A
2. Voltmeter of range 10 V
3. Moving coil galvanometer
4. A copper wire having 1 m length and 3 mm diameter

Correct answer: 2. Voltmeter of range 10 V

## In single phase energy meter, if brake magnet is moved toward the center of spindle, the disc speed

In single phase energy meter, if brake magnet is moved toward the center of spindle, the disc speed:

1. Decreases
2. Increases
3. Remains same
4. None of these