Question

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

Answer 1

The energy provided when the bullet is being accelerated must be equal to the energy gained by the bullet,i.e.,
m= 2 gm =0.002kg
1/2mv^2 = Q×V QV = 1/2×2×10^-3×10^2
V =( 10^-1)/(2×10^-3 )Volts=50 V