Physics · Alternating Current
A coil of self-inductance L is connected in series with a bulb B and an AC source. The brightness of the bulb decreases when:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1An iron rod is inserted into the coil✓
- 2A capacitance of reactance XC = XL is included in the same circuit
- 3The number of turns in the coil is reduced
- 4The frequency of the AC source is decreased
Correct answer
An iron rod is inserted into the coil
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