if a circuit has a voltage of 3V , and a resistance of 1.5Ω, what will the current be?

What do the letters p.d. stand for when you are discussing circuits?

 In this version of the formula triangle, what does “I” stand for?

What is the symbol used for current in a circuit? 

A washing machine has a potential difference of 240V across it.

To protect it from surges in current that might damage the motor, it needs a fuse.

The resistance of the washing machine is 22 Ω.

What would be the best fuse to choose for this appliance?

A fuse has 12A of current passing through it.

It has 240V of potential difference across it.

What is the resistance of the fuse?

(remember: current x resistance = potential difference)