MCQ
A bulb and a capacitor are in series with an $ac$ source. On increasing frequency how will glow of the bulb change
- AThe glow decreases
- ✓The glow increases
- CThe glow remain the same
- DThe bulb quenches
✓
Answer
Correct option: B.
The glow increases
b
(b) This is because, when frequency $\nu$ is increased, the capacitive reactance ${X_C} = \frac{1}{{2\pi \nu C}}$ decreases and hence the current through the bulb increases.
(b) This is because, when frequency $\nu$ is increased, the capacitive reactance ${X_C} = \frac{1}{{2\pi \nu C}}$ decreases and hence the current through the bulb increases.
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