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Physics CBSE Live product
Class 8 (2025-26)
Electricity: Magnetic and heating effects
Revision I - Electricity: Magnetic and heating effects
5.
Lifting electro magnet and Earth's magnetic field
Question:
2
m.
Choose the best answer below:
1.
What happens when the electric current flowing through a lifting electromagnet is switched off?
The magnetic field disappears
The objects stick permanently
The crane stops working
The electromagnet becomes stronger
2.
One important function of Earth’s magnetic field is that it
deflects harmful charged particles from space
increases Earth’s temperature
causes earthquakes
attracts meteors
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