Class 8 Exam > Class 8 Questions > An electric lamp glows due toa)Chemical effec... Start Learning for Free
An electric lamp glows due to
- a)Chemical effect
- b)Magnetic effect
- c)Heating effect
- d)None.
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
An electric lamp glows due toa)Chemical effectb)Magnetic effectc)Heati...
When electric current passes through a bulb, the filament of the bulb heats up to a high temperature. This is called heating effect of current. The temperature is so high that it starts glowing.
However, if the current through a circuit is weak, the filament does not get heated up sufficiently and it does not glow.
However, if the current through a circuit is weak, the filament does not get heated up sufficiently and it does not glow.
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An electric lamp glows due toa)Chemical effectb)Magnetic effectc)Heati...
Explanation:
An electric lamp glows due to the heating effect of electric current. When an electric current passes through a filament in the lamp, the filament gets heated up and starts to glow.
Heating Effect of Electric Current:
When an electric current passes through a conductor, it generates heat due to the resistance offered by the conductor. This phenomenon is known as the heating effect of electric current.
Working of an Electric Lamp:
1. An electric lamp consists of a thin filament made of tungsten wire enclosed in a bulb filled with an inert gas (usually argon or nitrogen).
2. When an electric current is passed through the filament, the filament offers resistance to the flow of electrons.
3. As a result, the filament gets heated up due to the conversion of electrical energy into heat energy.
4. The filament reaches a high temperature and starts to glow, producing light.
Comparison with other options:
a) Chemical effect: Chemical effect of electric current is observed when an electric current is passed through an electrolyte, causing a chemical reaction. It is not related to the glow of an electric lamp.
b) Magnetic effect: Magnetic effect of electric current is observed when an electric current produces a magnetic field. It is not related to the glow of an electric lamp.
d) None: This option is incorrect as the electric lamp glows due to the heating effect of electric current.
Conclusion:
The correct answer is option 'C' - Heating effect. The electric lamp glows because the electric current passing through the filament heats it up, causing it to emit light.
An electric lamp glows due to the heating effect of electric current. When an electric current passes through a filament in the lamp, the filament gets heated up and starts to glow.
Heating Effect of Electric Current:
When an electric current passes through a conductor, it generates heat due to the resistance offered by the conductor. This phenomenon is known as the heating effect of electric current.
Working of an Electric Lamp:
1. An electric lamp consists of a thin filament made of tungsten wire enclosed in a bulb filled with an inert gas (usually argon or nitrogen).
2. When an electric current is passed through the filament, the filament offers resistance to the flow of electrons.
3. As a result, the filament gets heated up due to the conversion of electrical energy into heat energy.
4. The filament reaches a high temperature and starts to glow, producing light.
Comparison with other options:
a) Chemical effect: Chemical effect of electric current is observed when an electric current is passed through an electrolyte, causing a chemical reaction. It is not related to the glow of an electric lamp.
b) Magnetic effect: Magnetic effect of electric current is observed when an electric current produces a magnetic field. It is not related to the glow of an electric lamp.
d) None: This option is incorrect as the electric lamp glows due to the heating effect of electric current.
Conclusion:
The correct answer is option 'C' - Heating effect. The electric lamp glows because the electric current passing through the filament heats it up, causing it to emit light.
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An electric lamp glows due toa)Chemical effectb)Magnetic effectc)Heating effectd)None.Correct answer is option 'C'. Can you explain this answer? for Class 8 2026 is part of Class 8 preparation. The Question and answers have been prepared according to the Class 8 exam syllabus. Information about An electric lamp glows due toa)Chemical effectb)Magnetic effectc)Heating effectd)None.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 8 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An electric lamp glows due toa)Chemical effectb)Magnetic effectc)Heating effectd)None.Correct answer is option 'C'. Can you explain this answer?.
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