Question

an electric current passing through a conductor is 5 ampere calculate the number of electrons that through a given cross section of a conductor in 1 microsecond

Answer 1

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Class 12

>>Physics

>>Current Electricity

>>Electric Current

>>A current of 5 A flows through a conduct

Question

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A current of 5A flows through a conductor. Calculate the number of electrons flowing through the conductor in 2s. [Take charge of electron as 1.6×10

−19

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Solution

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Correct option is B)

Total charge that flows in 2s is given by

q=It=5×2=10C

Now, charge on one electron is given by e=1.6×10

−19

C

N= number of electrons

q=Ne

⟹N=

e

q

⟹N=

1.6×10

−19

10

⟹N=6.25×10

19