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प्रश्न
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.
विकल्प
5 V
50 V
5 KV
50 KV
MCQ
उत्तर
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
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