a. The chemical energy stored in a fossil fuel produces heat energy when the fuel is burned. Describe how this heat energy is then used to produce electrical energy at a power station.

b. Power stations use transformers to increase the voltage to very high values before transmitting it to all parts of the country. Explain why electricity is transmitted at very high voltages.

c. A power station produces electricity at 25 000 V which is increased by a transformer to 400 000 V. The transformer has 2000 turns on its primary coil. 

Use the formula to calculate the number of turns on its secondary coil.

Transcribed Image Text:

voltage across primary coil number of turns on primary coil voltage across secondary coil number of turns on secondary coil