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

by

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

(a) 5 kV

(b) 50 kV

(c) 5 V

(d) 50 V

Click to See Answer :
Ans: (b)
Sol: K = qV

1/2 mv2 = qV

V = (mv)2/2q

= (2 × 10-3 × (10)2)/(2 × 2 × 10(-6) )

= 5 × 104 V

= 50 kV

 

Also Read :

Leave a Comment