Question

Two bulbs, one of 200W and the other of 100W, are connected in series with a 100V battery which has no internal resistance. Then,

• A. the current passing through the 200W bulb is more than that through the 100W bulb
• B. the power dissipation in the 200W bulb is more than that in the 100W bulb
• C. the voltage drop across the 200W bulbs is more than that across the 100W bulb
• D. the power dissipation in the 100W bulb is more than that in the 200W bulb

Answer 1

The correct option is D the power dissipation in the 100W bulb is more than that in the 200W bulb

Bulbs are connected in series and resistance of 100 W is greater then that of 200 watt.

In series, $P=I^{2}R$ (Here I is constant)

So, $P\propto R$

So, power of 100 W will be greater in the combination.