The glowing of the bulb is based on which effect of electric current ?

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Heating

Magnetic

Luminous

None of the above

answer is A.

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Detailed Solution

Concept- A bulb is similar to a resistance that is connected across a source. When current runs through a resistor, heat is generated for the duration of the current flow. When a resistor is heated to an extremely high temperature, it begins to turn red and produce light. We may simply deduce that the bulb is illuminated.
The filament of a bulb is constructed of tungsten metal. The filament begins to glow and emit light when current is supplied through the bulb. The bulb will not glow if the current drawn from the source is insufficient. The heat generated in the bulb comes from

where V is the potential difference across the bulb and t is the time it takes for current to flow through it. The bulb did not glow when the current was insufficient, as we can see from equation 1, since the heat created was insufficient to turn the filament of the bulb hot red. When the filament's metal isn't oxidised, the filament glows brightest. As a result, non-reactive gases are used to fill the bulbs.
As a result of the foregoing facts, we can conclude that the bulb glows as a result of the heating impact of electric current.
Hence, option 1 is the correct answer.

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