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10 April, 10:48

A 9.0-v battery is connected to a bulb whose resistance is 2.5 ω. part a how many electrons leave the battery per minute?

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  1. 10 April, 11:49
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    Solution:

    According to the formula I=V/R

    so 9.0v/2.5ohm=3.6A

    since 3.6A=3.6c/s

    therefore for per minute

    3.6*60=216c leaving the battery.

    Now,

    Each electron carries a charge of 1.6*10^ (-19) c

    so 216 / 1.6*10^ (-19) = 1.35*10^21c

    1.35*10^21c this is the required electrons leaving the battre per minute.
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