1.

A capacitor of capacity `2muF` is charged to `100 V`. What is the heat generated when this capacitor is connected in parallel to n another capacitor of same capacity?A. `2.5mJ`B. `5.0mJ`C. `10mJ`D. `4mJ`

Answer» Correct Answer - B
`q=CV=200muC`
In parallel the common potential is given by
`V=("Total charge")/("Total capacity")`
`=(200muC)/((2+2)muF)=50V`
Heat loss=`U_i-U_f`
`=1/2(2xx10^-6)(100)^2-1/2(4xx10^-6)(50)^2`
`=5xx10^-3J`
`=5mJ`


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