Question

A bullet of mass of 2 g is having a charge of 2 µc. Through what potential difference must it be accelerated, starting from rest, to acquire a speed of 10 m/s.

Options

• 5  V

• 50 V

• 5 KV

• 50 KV

Answer 1

50 KV

Explanation:

Kinetic energy = work done

eV = `1/2 mv^2`

V = `1/2 m/e V^2`

V = `1/2 xx (2 xx 10^-3 (10)^2)/(2 xx 10^-6)`

= `5 xx 10^4` Volt

= 50 KV