Question

The switch in the circuit shown in Figure is closed and the light bulb glows steadily. The inductor simple air-core solenoid. As an iron rod is inserted into the interior of the solenoid. the brightness of the light bulb. a ) increase. b)decreases.or(c) remains the same​

Answer 1

Answer:

b: decreases.

Explanation:

The brightness of the bulb depends on the potential difference across the bulb.

Greater the potential difference ,brighter the bulb glows.

Conclusion:

Introducing an iron rod into the solenoid increases the inductane of the coil. Therefore, the Potential difference across the solenoid increases.

As a result, the potential difference across the bulb decreases.