CBSE Class 12-science Answered
An electric lamp having coil of negligible inductance connected in series with a capacitor and an AC source is glowing with certain brightness. How does the brightness of the lamp change on reducing the (i) capacitance, and (ii) the Frequency? Justify your answer.
Asked by Topperlearning User | 22 Jun, 2015, 11:33: AM
Expert Answer
(a) By reducing the capacitance, the capacitive reactance 
will increase. So the bulb brightness will decrease.
(b) By reducing the frequency, the capacitive reactance will again increase. So the bulb brightness will again decrease.
Answered by | 22 Jun, 2015, 01:33: PM
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