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Questions  

8 identical capacitors each of capacitance 2µF are to be combined to obtain an equivalent capacitor of capacitance 1µF . Then which of the following combinations is possible?

a
All capacitors are in series combination
b
All capacitors are in parallel combination
c
4 are connected in parallel combination and two such combinations are connected in series.
d
2 are connected in parallel combination and four such combinations are connected in series.

detailed solution

Correct option is D

1CAb=12C+12C+12C+12C⇒CAB=2C4=C2=2μF2=1μF

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Two capacitors C1 and C2 having capacitance 2μF and 4μF respectively are connected as shown in the figure. Initially C1 has charge 4μC and C2 is uncharged. After long time closing the switch S :


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