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A short magnet oscillates in an oscillat...

A short magnet oscillates in an oscillation magnetometer with a time period of 0.10s where the earth's horizontal magnetic field is `24 muT`. A downward current of `18A` is established in a vertical wire placed 20cm east of the magnet. Find the new time period.

A

4Hz

B

2.5Hz.

C

9Hz

D

5Hz

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AAKASH SERIES-APPENDICES ( REVISION EXERCISE )-REVISION EXERCISE (MAGNETISM AND MATTER )
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  13. A short magnet oscillates in an oscillation magnetometer with a time p...

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