Question

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

• A. 50 kV
• B. 5V
• C. 50 V
• D. 5kV

Answer 1

The correct option is A 50 kV

Net work done in accelerating = Change in kinetic energy

QV=$\frac{m{v}^2}{2}$

Putting values of Q,v and m we get V=50 kV