A lamp is connected is series with a capacitor and an AC source, what happens if the capacity of the capacitor is reduced ?

Question

A lamp is connected is series with a capacitor and an AC source, what happens if the capacity of the capacitor is reduced ? (A) The lamp shines more brightly (B) The lamp shines less brightly (C) There is no change in the brightness of the lamp (D) Brightness may increase or decrease depending on the frequency of the AC

Tardigrade Admin · Accepted Answer

The lamp shines less brightly because, when capacity of the capaictor is reduced, the capacitive reactance (XC=(1/ω C)) increases and hence, the current through the lamp decreases

Q. A lamp is connected is series with a capacitor and an $A C$ source, what happens if the capacity of the capacitor is reduced ?

The lamp shines more brightly

The lamp shines less brightly

There is no change in the brightness of the lamp

Brightness may increase or decrease depending on the frequency of the $A C$

The lamp shines less brightly because, when capacity of the capaictor is reduced, the capacitive reactance $(X_{C} = \frac{1}{ω C})$ increases and hence, the current through the lamp decreases

Q. A lamp is connected is series with a capacitor and an AC source, what happens if the capacity of the capacitor is reduced ?