Grade 9 - Transformers

Test yourself on Grade 9 - Transformers

• At one coal power plant, electricity is generated at voltages of around 20,000 V. If electricity is transmitted at 400,000 V, what must the current pass through after generation, before transmission?

• If there are 600 turns on the secondary coil, how many turns must there be on the primary coil in order for the 20,000 V potential difference to be 'stepped-up' to 400,000 V?