Question

Name the effect of current responsible for the glow of the bulb in an electric circuit.
A. Chemical
B. Heating
C. Magnetic
D. Heating and magnetic

Answer 1

Hint: Recall the phenomenon by which a bulb glows.
Study the main effect that causes the bulb to glow when an electric current is passed through the filament of the bulb.

Complete step by step answer:
The bulb contains inert gases and a filament made up of tungsten.
When an electric current is passed through the tungsten filament, the due to the resistance of the
filament and the drift of the electrons due to the current, the filament starts heating. Hence, the inert gas in the filament also starts heating.
Due to this heating of the filament and the inert gas, the bulb glows emitting light.
Therefore, the effect of current responsible for the glow of the bulb in an electric circuit is heating effect
and not chemical effects.
Hence, the option A is incorrect.

The bulb contains inert gases and a filament made up of tungsten.
When an electric current is passed through the tungsten filament, due to the resistance of the filament and the drift of the electrons due to the current, the filament starts heating. Hence, the inert gas in the filament also starts heating.
Due to this heating of the filament and the inert gas, the bulb glows emitting light.
The electric current flowing through the filament also results in a magnetic effect but it is not responsible for the glowing of the bulb.
Therefore, the effect of current responsible for the glow of the bulb in an electric circuit is heating effect and not magnetic effect.
Hence, the option C is incorrect.
The bulb contains inert gases and a filament made up of tungsten.
When an electric current is passed through the tungsten filament, due to the resistance of the filament and the drift of the electrons due to the current, the filament starts heating. Hence, the inert gas in the filament also starts heating.
Due to this heating of the filament and the inert gas, the bulb glows emitting light.
The electric current flowing through the filament also results in a magnetic effect but it is not responsible for the glowing of the bulb.
Therefore, the effect of current responsible for the glow of the bulb in an electric circuit is heating effect and not both heating and magnetic effect.
Hence, the option D is incorrect.

The bulb contains inert gases and a filament made up of tungsten.
When an electric current is passed through the tungsten filament, due to the resistance of the filament and the drift of the electrons due to the current, the filament starts heating. Hence, the inert gas in the filament also starts heating.
Due to this heating of the filament and the inert gas, the bulb glows emitting light.
The electric current flowing through the filament also results in magnetic effect but it is not responsible for the glowing of the bulb.
Therefore, the effect of current responsible for the glow of the bulb in an electric circuit is the heating effect.

So, the correct answer is “Option B”.

Note:
Due to the moving electrons in the filament of the bulb, a magnetic field is also produced resulting in some magnetic effects. But the magnetic effect is not the reason for the glowing of the bulb.