The gap between electrodes in a spark plug is 0.060 cm. Producing an electric spark in a gasoline-air mixture requires an electric field of 3.0 x 10^6 V/m. What is the magnitude of the minimum potential difference that must be supplied by the ignition circuit to start a car

The magnitude of minimum potential difference is 1800 V

Explanation:

Given:

Electric field

Gap between electrodes m

For finding the minimum potential difference,

  V

Therefore, the magnitude of minimum potential difference is 1800 V

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.