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Question

The ratio of the resultant capacities when three capacitors of 2μF,4μF and 6μF are connected first in series and then in parallel is


A
1:11
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B
11:1
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C
12:1
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D
1:12
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Solution

The correct option is A 1:11
When capacitor in series
1Ceffs=1C1+1C2+1C3
1Ceff=12+14+16
1Ceff=6+3+212
Ceff=1211
Ceffp=C1+C2+C3
=2+4+6
=12
CSCP=111

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