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Question

In a lab experiment, three capacitors each of capacitance C and of breakdown voltage V are joined in series. Then capacitance and breakdown voltage of the combination will be?


A
C3, 3V
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B
3C, 3V
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C
C3, V3
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D
C3, 1.5V
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Solution

The correct option is A C3, 3V
Given: C1=C2=C3=C

These three capacitors are connected in series for the input voltage of V volt.
The equivalent capacitance of the series combination is,

1Ceq=1C1+1C2+1C3

i.e. 1Ceq=1C+1C+1C

Therefore, 1Ceq=3C

So, Ceq=C3

Now, the required breakdown voltage,

V=QmaxCeq=CVC/3=3V

Option (a) is the correct answer.

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