Discussion
Three capacitors are connected in parallel, two of them have a breakdown voltage of 250 V and one of them has a breakdown voltage of 200 V. The maximum voltage that can be applied to the parallel group without damaging any capacitor is:
Answer: D
Capacitors connected in parallel all have the same voltage across them, so the voltage applied to the group cannot be more than the lowest breakdown voltage of any one of them. Two of the capacitors can take 250 V but one can take only 200 V, so the highest voltage that can be applied without damaging any of them is 200 V, option (D). The values 250 V, 600 V and 650 V would break down the 200 V capacitor, and the voltages do not add in parallel.
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