Electrostatics 5 Question 37
39. Two capacitors $C_{1}$ and $C_{2}$ are charged to $120 \mathrm{~V}$ and $200 \mathrm{~V}$ respectively. It is found that by connecting them together the potential on each one can be made zero. Then
(2013 Main)
(a) $5 C_{1}=3 C_{2}$
(c) $3 C_{1}+5 C_{2}=0$
(b) $3 C_{1}=5 C_{2}$
(d) $9 C_{1}=4 C_{2}$
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Answer:
Correct Answer: 39. (b,c)
Solution:
- Polarity should be mentioned in the question. Potential on each of them can be zero if, $q_{\text {net }}=0$
$$ \text { or } \quad q_{1} \pm q_{2}=0 $$
or $\quad 120 C_{1} \pm 200 C_{2}=0$ or $3 C_{1} \pm 5 C_{2}=0$
