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Physics CBSE Live product
Class 10
Magnetic effects of electric current
Electromagnetism and magnetic effect of current
4.
Earth as a magnet
Question:
4
m.
1
.
Which of the following is true about Earth’s magnetic field?
A compass needle shows the direction of Earth’s magnetic field.
It never changes.
The compass points to the geographic north pole.
It is strongest at the equator.
2
.
Which of the following is the main source of magnetism in a bar magnet?
spinning of electrons
spinning of atoms
polarization of atoms
orbital motion of electrons
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