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Inside the magnet, field lines travel from?

(a) North to south

(b) South to north

(c) West to east

(d) East to west

I got this question during an online interview.

My question is from Characteristics of Lines of Magnetic Flux topic in section Electromagnetism of Basic Electrical Engineering

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The correct answer is (b) South to north

Explanation: Magnetic field lines originate at the north pole and terminate at the south pole of the magnet and magnetic field lines form closed loop so inside the magnet, they move from south to north.

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