Question

If a charge on the body is InC, then how
many electrons are present on the body?
(a) 6.25 x 1027
(b) 1.6 x 1019
(c) 6.25 x 1028
(d) 6.25 x 10°​

Answer 1

Answer:

a) 6.25×1018

Explanation:

Number of excess electrons present on the body 'A', n=6.25×1018. Charge of each electron (e)=1.6×10-19C. ∴ Total charge present on the body 'A' is Q=n×e. ... ∴ Charge on each body =-3C.

MARK IT AS BRAINLIEST

Answer 2

Answer:

The number of electrons present on the body is $6.25\times 10^{9}$

Explanation:

Given a charge on the body, $Q= 1nC=1\times 10^{-9} C$

The charge on a body is the integral multiple of the elementary charge on the body, and is called quantization of electric charge.

Mathematically given by $Q=ne$.

where 'n' is the number of electrons and

'e' is called the elementary electric charge that is equal to charge of an electron, hence, $e=1.6\times 10^{-19} C$

For number of electrons,

$n=\dfrac{Q}{e}$

Substituting the values in the formula,

$n= \dfrac{1\times 10^{-9} }{1.6\times 10^{-19} }$

$=0.625\times 10^{10} =6.25\times 10^{9}$

Hence, the number of electrons present on the body is $6.25\times 10^{9}$.

So, the correct answer is option d, assuming the power is 9 in the option.