First slide

Inductance

Question

A coil and a bulb are connected in series with a dc source, a soft iron core is then inserted in the coil. Then

Moderate

A

Intensity of the bulb remains the same
B

Intensity of the bulb decreases
C

Intensity of the bulb increases
D

The bulb ceases to glow

Solution

There will be self induction effect when soft iron core is inserted. The reactance offered by the coil to a DC current is zero. Intensity depends only on resistance. So the bulb glow with same intensity.

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