Explanation:

The given question is related to the working of an electric bulb when connected to an AC source. Let us understand the answer to the question in detail.

The working of an electric bulb:

An electric bulb consists of a filament made up of tungsten wire which is enclosed in a glass bulb filled with an inert gas like argon. When an electric current flows through the filament, it gets heated up and produces light. The amount of light produced depends on the temperature of the filament. When the temperature of the filament reaches a certain level, it starts glowing and emits light.

Working of AC source:

An AC source is a source of electrical energy that produces an alternating current. In an AC source, the direction of current changes periodically. The frequency of the current is measured in Hertz (Hz) and indicates the number of cycles per second.

Answer to the question:

When an electric bulb rated 220 V is connected to a 220 V, 5 Hz AC source, the bulb glows immediately. This is because the voltage of the AC source is equal to the rated voltage of the bulb. As soon as the current flows through the filament, it gets heated up and starts emitting light. The frequency of the AC source does not affect the working of the bulb as long as the voltage is within the rated value.

Options other than B:

a) Does not glow: This option is incorrect as the bulb will glow when connected to an AC source of the same voltage.

c) Glows continuously: This option is incorrect as the bulb will glow as long as it is connected to the AC source. It will not glow continuously without any power source.

d) Gets fused: This option is incorrect as the bulb will not get fused unless the voltage of the AC source exceeds the rated voltage of the bulb.

Conclusion:

In conclusion, an electric bulb rated 220 V will immediately start glowing when connected to a 220 V, 5 Hz AC source. The frequency of the AC source does not affect the working of the bulb as long as the voltage is within the rated value.