What’s that object?

Answers

1) How many did you get?

(It’s always the electric fan that catches you out!)

2) Which is the odd one out

The calculator, because it doesn’t need to be plugged in to work.

3) Which uses most electricity if you use it for an hour?

The electric kettle is likely to use most electricity if used for an hour. Good job it only takes a couple of minutes to boil!