Discussion
Two bulbs are fitted in a room in the domestic electric installation. One of them glows brighter than the other. Then
Answer: A
The brighter bulb has the smaller resistance.
Household bulbs are in parallel, so both have the same voltage across them: \[P = \frac{V^2}{R}\] With \(V\) fixed, power varies inversely with resistance, so the lower-resistance bulb dissipates more and glows brighter. In a series circuit the opposite would hold.
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