When there is an electric current in a resistor, there is an energy transfer which heats the resistor. Which of the following explains why there is an energy transfer?

Electrical currents do work against resistance, causing an energy transfer. How is the energy transferred to the surroundings?

How can we reduce the unwanted energy transfers through wires?

Which of the following are advantages of the heating effect of an electric current? (Current causes heating in wires)

Which of the following is the correct equation for energy transferred?

A 230 V electricity supply gives a current of 2.6 A to a water heater for 25 minutes, calculate the energy transferred. (Add the units to your answer)

Which of the following is the correct description of power and correct units?

Which of the following is the correct equation for electrical power?

Calculate the energy transferred when a 550 W heater is used for 5 minutes.

The power transfer in an electrical device is related to the potential difference across it and the current through it. Which is the correct description of this relationship?

Which of the following is the correct equation describing the relationship between, power, current and potential difference (voltage)?

Which of the following is the correct equation describing the relationship between, power, current and resistance?

Drag and drop to match the description to the type of current

Batteries, mains power, does, does not

Does, does not, sometimes

In A.C. in the UK the cycle happens 50 times per second. What does this tell us?

What is the voltage of the UK domestic mains supply? Include the units in your answer

What is the energy transferred from a microwave with an 800 W power rating.