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Standard VIII
Physics
Conducting Liquid
Question

When electric current passes through the filaments of a bulb, it starts emitting light due to:
  1. Heating effect of electric current
  2. Chemical effect of electric current
  3. Magnetic effect of electric current
  4. Lighting effect of electric current

A
Heating effect of electric current
B
Magnetic effect of electric current
C
Lighting effect of electric current
D
Chemical effect of electric current
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Solution
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When electric current passes through the filaments of the bulb, it starts emitting light due to the heating effect of the electric current. Most of the power consumed by the filament appears as heat, but a small part of it is in the form of light radiated.

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