Multiple choice

Consider a conductor which passes 5 x 1016 electrons in 1 minute. Calculate the current flowing in the conductor.

  1. 0.133 mA

  2. 480 mA

  3. 7500 A

  4. 187.5 x 1035 A

  5. 0.0053 x 10-35 A
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A Correct answer
Explanation

The charge of an electron is = 1.6 x 10-19 coulomb i = n x e / t 5 x 1016 x 1.6 x 10-19 = 8 x 10-3. Therefore, charge passes across the section in one second, is 8 x 10-3 coulomb/60 second = 0.133 mA

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