Electric Potential

Homework Solution

25.X1 The gap between electrodes in a spark plug is 0.0060 cm. to produce an electric spark in a gasoline-air mixture, an electric field of 3.0 x 106 V/m must be achieved. When starting the car, what minimum voltage must be supplied by the ignition circuit?

E = V / x

V = E x

V = = [3 x 106 V/m][0.006 cm][ m / 100 cm ]

V = = 180 V

(As always), be careful with the units and with the zeroes!

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