Step-up transformer -> lower current -> less cable heating -> efficient transfer

Question 3 of 4

AQA Combined Science Higher Physics Paper 1 3 marks

The potential difference across the primary coil in transformer Y is 400 000 V. The potential difference across the secondary coil is 11 000 V. The current in the primary coil is 660 A. Calculate the current in the secondary coil of transformer Y. Use the Physics Equations Sheet. Current in the secondary coil = A

Try from memory first

Compare with the chain after you check.