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Damped Oscillations

10. A vibrati...

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10. A vibration magnetometer placed in magnetic meridian has a small bar magnet. The magnet executes oscillations with a time period of 2 s in earth's horizontal magnetic field of 24 microtesla. When a horizontal field of 18 microtesla is produced opposite to the earth's field by placing a current carrying wire, the new time period of magnet will be: AIPMT (Prelims)-2010] (1) 4 s (2) 1 s (3) 2s (4) 3 s

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