JAMB - Physics (2010 - No. 27)
Power supply is transmitted at a very high voltage and low current in order to?
make pass through the trasformers
increase the power supply
make it travel fast
prevent overheating of the coil
Giải thích
H eat generated in a wire carrying current, H = 12 Rt.
so, when voltage is high and current is low heat generated in the wire will be minimal.
Therefore, high voltage and low current prevent overheating of the coil.
so, when voltage is high and current is low heat generated in the wire will be minimal.
Therefore, high voltage and low current prevent overheating of the coil.