Question

A spark is generated in an automobile spark plug when there is an electric potential of 3000 V across the electrode gap. If 75 W of power is generated in a single spark that lasts 100 ns, what is the instantaneous current across the gap? O 5 mA O 7.5 mA O 12 mA O 25 mA O 32 mA

Answer 1

Power = curren x potential diff

P = V I

putting values,

75 W = (3000 V ) (I)

I = 0.025 A = 25 mA