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Question

If a body has a charge of magnitude 8×1019 coulomb what is the correct combination of protons and electrons on it?


A

58 p and 53 e

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B

60 p and 64 e

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C

15 p and 12 e

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D

105 p and 112 e

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Solution

The correct option is A

58 p and 53 e


Look, the net charge will always be the differencebetween the number of electrons and protons.

We know

Q = ne

8×1019=n×1.6×1019

n = 5

as we are talking in terms of magnitude, the net charge will be the difference of number of protons and electrons which should be 5. Now look at the options again and shout out the answer. Loud!


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