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Physics CBSE Live product
Class 8 (2026-27)
Electricity: Magnetic and Heating Effect
PT1 Revision - Electricity: Magnetic and Heating Effect
4.
Heating effect of electric current
Question:
2
m.
Choose the best answer:
1
.
What happens to the nichrome wire when electric current passes through it?
It becomes cold
It changes colour permanently
It becomes warm
It melts immediately
2
.
Why does the filament in an incandescent lamp glow?
Because electric current heats it
Because it contains water
Because it becomes cold
Because air enters the bulb
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