Statement 1: Two bulbs of same wattage, one having a carbon filament and the other having a metallic filament are connected in series. Metallic bulb will glow more brightly than carbon filament bulb.Statement 2: Carbon is a semiconductor.

# Statement 1: Two bulbs of same wattage, one having a carbon filament and the other having a metallic filament are connected in series. Metallic bulb will glow more brightly than carbon filament bulb.Statement 2: Carbon is a semiconductor.

1. A

Both statements 1 and 2 are correct

2. B

Statement 1 is correct statement 2 is incorrect

3. C

Statement 1 is incorrect statement 2 is correct

4. D

Both statements 1 and 2 are incorrect

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### Solution:

In series, current remains same. So, power P is proportional to resistance R, i.e, $\mathrm{P}\text{\hspace{0.17em}\hspace{0.17em}}\propto \text{\hspace{0.17em}\hspace{0.17em}}\mathrm{R}$.  Now, resistance of carbon is more than a metal since carbon is a nonmetal. So, carbon filament glows more brightly. Also, carbon is not a semiconductor.

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