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How many `6muF, 200V` condensers are needed to make a condenser of `18muF, 600?`A. 9B. 18C. 3D. 27

Answer» Correct Answer - D
In series arrangement, potential difference is the sum of the individual potential difference of each capacitor.
`"i.e. "V=V_(1)+V_(2)+V_(3)+…`
`therefore" "600=x xx 200`
x = 3
So, there should be 3 capacitors in series to obtain the required potential difference.
The equivalent capacitance of the 3 capacitors in series is
`(1)/(C_("eq"))=(1)/(6)+(1)/(6)+(1)/(6) rArr C_("eq")=2`


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