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

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
Sol: (b)
K = qV
1/2 mv2 = qV
V = (mv)2/2q
= (2 × 10-3 × (10)2)/(2 × 2 × 10(-6) )
= 5 × 104 V
= 50 kV

Author: Rajesh Jha

QuantumStudy.com for CBSE|IIT-JEE|NEET

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