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A bar magnet makes 40 oscillations per minute in an oscillation magnetometer.

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A bar magnet makes 40 oscillations per minute in an oscillation magnetometer. An identical magnet is demagnetized completely and is placed over the magnet in the magnetometer. Find the time taken for 40 oscillations by this combination. Neglect any induced magnetism.

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For 1 oscillation Time taken = 0.03536min.

For 40 Oscillation Time = 4 × 0.03536 = 1.414 = √2min

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