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Power Calculations

Last updated over 5 years ago
18 questions
1

1. What is the formula linking power, current and voltage?

1

Rearrange this formula to calculate current.

1

Rearrange this formula to calculate voltage.

1

What is the formula linking power, current and resistance?

1

Rearrange this formula to find current.

1

Rearrange this formula to find resistance.

1

A kettle has a current of 10A and a p.d. of 230V. Calculate the power output.

1

A TV has a current of 80A and a p.d. of 230V. Calculate the power output

1

A toaster has a current of 20A and a p.d. of 230V. Calculate the power output

1

Work out the resistance for the kettle from question 7.

1

Work out the resistance for the TV from question 8.

1

Work out the resistance for the toaster from question 9.

1

The heating element in a kettle produces an output of 1200W using mains electricity. Calculate the current flowing through it.

1

A TV produces an output of 5000W using mains electricity. Calculate the current flowing through it.

1

A toaster produces an output of 2.5kW using mains electricity. Calculate the current flowing through it.

1

If the resistance of a kettle is 20Ω, with a power output of 2.2kW, what is the current flowing through it?

1

If the resistance of a TV is 70Ω, with a power output of 5kW, what is the current flowing through it?

1

If the resistance of a toaster is 20Ω, with a current flowing through it of 20A, what is the power output?