Question

(Ques. 35]. An inductor and a bulb are connected in series with a dc source. A soft iron core is then inserted in the inductor. What will happen to intensity of the bulb? (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.​

Answer 1

Answer:

answer is a intensity of the bulb remains the same

Answer 2

The Intensity of the bulb increases when a soft iron core is inserted into the inductor.

Explanation:

• When an inductor and a bulb are connected in series with a dc source. And then we insert a soft iron core in the inductor.  
• The intensity of the bulb will increase.
• The soft iron core in the inductor acts in the self-induction effect.
• The Self-induction process refers to the induction of voltage in the current-carrying wire. And, the current in the wire is changing on its own.
• Hence, this increases the intensity of the bulb.