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Question

A body has charge (q) on it. Which of following is the possible value of charge (q) on the body ?

A
0.8 × 1019
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B
1 × 1019
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C
3.2 × 1019
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D
9.1 × 1019
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Solution

The correct option is C 3.2 × 1019
Quantization of charge tells that amount of charge (q) on a body exists as an intergral multiple of charge on one electron(e). Which means it can be written as:
q = ne
Where
e = 1.6 × 1019 C
n = 0,1,2.....(both positive and negative integers)

From the given possible values only option c is an integral multiple of e.
q = ne
3.2 × 1019 = n × 1.6 × 1019 C
n = 2

Hence option C is the correct answer



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