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A small magnet oscillating horizontally ...

A small magnet oscillating horizontally in the earth's magnetic field has a time period of 4 s. When another magnet is brought near it, it completes 50 oscillations in 160 s. Compare the magnetic field due to the magnet and the horizontal component of earth's field when (i) both the fields are in the same direction and (ii) the fields are in opposite directions.

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SL ARORA-MAGNETISM-Based on (i) Earth s Magnetism (ii) magnetic field of a bar magnet
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