Physics · Oct / Nov 2018 · Paper 11 · Question 9

An electric motor, connected to the mains, is used to lift bricks to the top of a building. There is a fuse in the plug. How can the efficiency of the motor be increased?

1. AIncrease the friction in the motor.
2. BReduce the energy losses in the motor.
3. CUse a fuse with a higher current rating.
4. DUse a fuse with a lower current rating.

As printed in the paper