1.

A capacitor of 50 muF is charged to 10 volts. Its energy in joules is

Answer»

`2.5 XX 10^(-3)`
`5 xx 10^(-3)`
`10 xx 10^(-4)`
`2.5 xx 10^(4)`

Solution :`U = (1)/(2) CV^(2) = (1)/(2) xx 50 xx 10^(-6) xx (10)^(2) = 2.5 xx 10^(-3)` J


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