Suppose every second 1016 electrons come out of a body and move to another body, then the time is required to get a total charge of 3.2 C on the other body is:

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Question

This question was previously asked in

AAI ATC Junior Executive 27 July 2022 Shift 2 Official Paper

Answer 1

Concept:

Quantization of Charge states that the charge of any object is an integer multiple of the elementary charge.

q = ne
where q is charge, n is integer or number of electrons transferred and e is an elementary charge (1.6 × 10^-19 C)

Calculation:

Given, total charge q = 3.2 C

From equation q = ne,

total no. of electrons transferred are, 3.2 = n × 1.6 × 10^-19

n = 2 × 10¹⁹

10¹⁶ electron come out of a body and move to another body in 1 second

Then total time required to move the total charge on the other body are,

\(t=\frac {2 \times 10^{19}}{10^{16}}=2000~s\)

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