Question

An object has charge of 1 C and gains 5.0 × 10¹⁸ electrons. The net charge on the object becomes ______.

विकल्प

• −0.80 C

• +0.80 C

• +1.80 C

• +0.20 C

Answer 1

An object has charge of 1 C and gains 5.0 × 10¹⁸ electrons. The net charge on the object becomes +0.20 C.

Explanation:

Charge of 1 electron = −1.6 × 10⁻¹⁹ C

So, Charge of 5.0 × 10¹⁸ electrons = −5 × 10¹⁸ × 1.6 × 10⁻¹⁹ C

= −0.8 C

Already existing charge = 1 C

So, net charge at present = 1 − 0.8

= 0.2 C