Question

when a 12-volt battery runs headlight of 20W then how many electrons pass through it in 10 sec?​

Answer 1

Answer:

10.3 x 10^20 electrons passes through it in 10 seconds.

Explanation:

I = P/V

= 200/12 = 16.6

Number of electrons passing through each second is

n = I/e = 16.6/1.6 x 10^-19

= 10.3 x 10^19

Number of electrons passing through 10 seconds is

10.3 x 10^19 x 10 = 10.3 x 10^20