Question

In an AC circuit with a bulb and inductor, what happens to the bulb’s brightness when an iron rod is inserted into the inductor?

विकल्प

• Decreases

• Remains unchanged

• Will fluctuate

• Increases

Answer 1

Decreases

Explanation:

Due to insertion of an iron rod, inductance of the coil increases, thus increasing the impedance (Z) of the circuit and decreasing the current. Hence, brightness decreases.