Question

If a body has a charge of magnitude 8 × 10^–19 coulomb. What is the correct combination of protons and electrons on it

• A. 58 p and 53 e
• B. 60 p and 64 e
• C. 15 p and 12 e
• D. 105 p and 112 e

Answer 1

Answer: (A)

. 58 p and 53 e

The net charge will always be the difference between the number of electrons and protons.

We know that,

Q = ne

$\Rightarrow 8\times {10}^{–19}=n\times 1.6\times {10}^{–19}$

So, 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.

Thus option (B) is correct.