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An electric circuit requires a total cap...

An electric circuit requires a total capacitance of 2mF across a potential of 1000 V. Large number of 1mF capacitances are available each of which would breakdown if the potential is more than 350 V. How many capacitances are required to make the circuit

A

24

B

20

C

18

D

12

Text Solution

Verified by Experts

The correct Answer is:
C
Since, n `=(1000)/(350) = 2.85 `

n = 3 as n cannot be a fraction.
`C/n xxm = 2`
`implies 1/3 muF xx m = 2muF`
m = 6
Total number of capacitors `=n xxm = 3 xx 6 = 18`
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