041121

Question : Minimum number of capacitors each of 8µF and 250 V used to make a composite capacitor of 16µF and 1000 V are

a) 8

b) 32

c) 16

d) 24

Dobut by Eshani

Ans : b) is the correct option.

Detailed Solution : 
We know, When capacitors are connected in parallel then voltage gets added up.

Also, when capacitors are added in series then their equivalent capacitance gets reduced but when they are connected in parallel then their equivalent capacitance will increase (gets added).

In order to achieve the required output, we need to add 8 capacitors in parallel and such 4 combinations in parallel so the total number of capacitors used will be (8×1)+(8×1)+(8×1)+(8×1) = 32