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Question

If 1020 electrons flow from the black body to the red body through the copper wire in 8 seconds, then find the current flowing between them.


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Solution

Step 1: List the given values,

Number of electrons n=1020

Time taken for current to flow, t=8s

We know that the charge of an electron is e=1.6×10-19C

Step 2: Calculate the current

We know that current in terms of the no. of electrons and time taken is,

I=net

=1020×1.6×10-198

=168

=2A

Hence, the current flowing through the copper wire is 2A.


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