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in Physics by (70.0k points)

A magnetic needle suspended by a silk thread is vibrating in the earth’s magnetic field, if the temperature of the needle is increased by 500°C, then : 

(a) the time period decreases 

(b) the time period remains unchanged 

(c) the time period increases 

(d) the needle stops vibrating

1 Answer

+1 vote
by (71.7k points)
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Best answer

Correct option (d) the needle stops vibrating

Explanation:

When the magnetic needle is heated to such a high temperature, then the magnetic needle losses its magnetism, so, the restoring torque no longer acts and hence needle stops vibrating.

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