Question

State and explain four evidences to show the existence of earth’s magnetic field.

Answer 1

Answer:

Two evidences of existence of earth's magnetic field:

(i) A freely suspended magnetic needle always rests in geographic north-south direction.

(ii) Neutral points are obtained on plotting the field lines of a magnet.

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Answer 2

• (i) A freely suspended magnetic needle always rests in geographic north-south direction.
• (ii) Neutral points are obtained on plotting the field lines of a magnet.