Current Electricity

Question: Two bulbs of 500 watt and 200 watt are manufactured to operate on 220 volt line. The ratio of heat produced in 500 W and 200 W, in two cases, when firstly they are joined in parallel and secondly in series, will be

1) $\frac{5}{2},\,\frac{2}{5}$

2) $\frac{5}{2},\,\frac{5}{2}$

3) $\frac{2}{5},\,\frac{5}{2}$

4) $\frac{2}{5},\,\frac{2}{5}$

Solution:

Explanation: No Explanation

Heating Effect of Current Electric Power

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