First slide

Electrical power

Question

Two bulbs X and Y having same voltage rating and of power 40 watt and 60 watt, respectively, are connected in series across a potential difference of 300 volt, then

Moderate

A

X will glow brighter
B

resistance of Y is greater than X
C

heat produced in Y will be greater than X
D

voltage drop across X will be smaller than Y

Solution

Resistance $\propto \frac{1}{Power}$ . Thus, 40 W bulb has a high resistance, because of which there will be more potential drop across 40 W bulb. Thus 40 W bulb will glow brighter.

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