Physics (AS & A Level) · Oct / Nov 2019 · Paper 13 · Question 14

Trains supply coal to a power station. The table shows quantities describing the operation of the power station. | | symbol | unit | |---|---|---| | power station average output | P | W | | number of trains per day | N | | | mass of coal on a train | M | kg | | energy from 1 kg of coal | E | J | | number of seconds in one day | S | | Which expression gives the efficiency of the power station?

1. APS / NME
2. BPSN / ME
3. CNME / PS
4. DNM / PSE

As printed in the paper