# Electric Voltage MCQ Questions

Multiple Choice Questions on Electrical voltage

## SI unit of voltage is

SI unit of voltage is:

1. volts
2. amps
3. watts
4. ohms

SI unit of voltage is volts

More MCQs on Electrical Engineering Units

## By Definition the formula of voltage is

By Definition the formula of voltage is:

1. V = WQ
2. V = W + Q
3. V = W – Q
4. V = W/Q

Correct answer: 4. V = W/Q

## If 2 joules of energy is required to move a charge of 2 coulombs from one point to other, what is the potential difference between points

If 2 joules of energy is required to move a charge of 2 coulombs from one point to other, what is the potential difference between points:

1. 1 volt
2. 2 volts
3. 4 volts
4. 0.5 volt

Solution: V = W/Q = 2 J / 2 C = 1 V

## The voltage between two points is 20 V. How much energy is required to move 62*1018 electrons from one point to another

The voltage between two points is 20 V. How much energy is required to move 62*1018 electrons from one point to another:

1. 93.5 J
2. 198.6 J
3. 209.7 J
4. 315 J

Explanation:

coulombs = electrons ÷ 6.2415*1018

coulombs = 62*1018 ÷ 6.2415*1018 = 9.93 C

W = VQ = 20 V * 9.93 C = 198.6 J

## Voltage always remains same in

Voltage always remains same in

1. Series
2. Parallel