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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` |
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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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