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Q.

From a supply of identical capacitors rated 8μF,250V the minimum number of capacitors required to form a composite 16μF,1000V is _______

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answer is 32.

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Detailed Solution

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In each row four capacitors, are present then effective capacity is 2μF  and voltage is 1000 V. Eight  such rows are in parallel connection. Final equivalent capacity of the combination is 8×2μF=16μF and Voltage is 1000 V. 

 Total no. of capacitors are 8×4=32

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