A coil having self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decrease when

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A coil having self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decrease when

Option A and iron rod is inserted in the coil
Option B frequency of the AC source is decreased
Option C number of turns in the coil is reduced
Option D A capacitance of reactance XC = XL is included in the same circuit.

Solution: Correct Option A

The magnetic field within the inductor increases when an iron rod is added. As a result, the coil’s inductance rises. As a result, the reactance rises. As a result, a high quantity of voltage occurs across the inductor, leaving less voltage across the bulb, lowering the bulb’s brightness.

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More Material

The refractive index of glass is $1.5$ . What is the speed of light in glass? Speed of light in vacuum is $3.0 \times 10^{\mathrm{A}} \mathrm{ms}^{-1}$ .

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