Transformers and the national grid

EasyMediumHard
1234567891011121314151617181920
Question 12
Medium

There is an alternating current of 12 A in the primary coil of a transformer.

There is an alternating current of 3 A in the secondary coil of the transformer.

The transformer is 100% efficient.

The size of the potential difference (voltage) across the secondary coil is:

four times the size of the voltage across the primary coil

one-quarter the size of the voltage across the primary coil

four times the size of the current in the primary coil

one-quarter the size of the current in the primary coil

Transformers and the national grid Questions

  1. GCSE
  2. /Physics
  3. /Transformers and the national grid