Question

The charge on an object is given by q=ne ,here n is the number of electrons and e is the electronic charge. If an object has charge -5 * 10^-19 C, what should be the number of excess electron on it

Answer 1

q=ne

here,q=-5*10-¹⁹

and as we know that,e=1.6*10-¹⁹

-5*10-¹⁹=n1.6*10-¹⁹

-5*10-¹⁹/1.6*10-¹⁹=n

-50/16=n

-3.125=n

so number of excess electron on it are -3.125

Answer 2

Given:

Charge on an object = -5×10⁻¹⁹C

To Find:

The number of excess electron in it

Explanation:

Using the formula q = ne

where q = -5×10⁻¹⁹

Charge of electron

e=1.6×10⁻¹⁹

-5×10⁻¹⁹

=n1.6×10⁻¹⁹

-5×10⁻¹⁹/1.6×10⁻¹⁹

n =-50/16

n =-3.125

The number of excess electron = -3.125