Electrostatic Potential And Capacitance Ques 13
13. 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$ ?
[2004]
(a) $50 $ $V$
(b) $5$ $ kV$
(c) $50 $ $kV$
(d) $5 $ $V$
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Answer:
Correct Answer: 13.(c)
Solution:
- (c) $q V=\frac{1}{2}$ $ m v^{2}$
$\Rightarrow 2 \times 10^{-6} \times V=\frac{1}{2} \times \frac{2}{1000} \times 10 \times 10$
$\therefore V=50$ $ kV$
BETA
