when first they are joined in parallel and second in series

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Two bulbs 500 W and 200 W are manufactured to operate on 220 V line. The ratio of heat produced in 500 W and 200 W in two cases , when first they are joined in parallel and second in series, will be
20
Sep
Two bulbs 500 W and 200 W are manufactured to operate on 220 V line. The ratio of heat produced in 500 W and 200 W in two cases , when first they are joined in parallel and second in series, will be Two bulbs 500 W and 200 W are manufactured to operate on [...]
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