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प्रश्न
A lamp is connected in series with an inductor and an AC source. What happens to the brightness of the lamp when the key is plugged in and an iron rod is inserted inside the inductor? Explain.
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उत्तर
If an iron rod is inserted in the inductor, then the value of inductance L increases. As such, the current through the bulb will decrease, thus, decreasing the brightness of the bulb.
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