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A conductor of length 20cm and mass 18 m...

A conductor of length 20cm and mass 18 mg lies in a direction of `60^@ ` N of E. If the horizontal component of earth's magnetic field is` 36 mu `T , the current to be passed in the conductor so that it is suspended in air is (g = 10 `ms^(-2)` )

A

`20A`

B

`50 A `

C

`40 A `

D

`10 A`

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The correct Answer is:
B
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AAKASH SERIES-APPENDICES ( REVISION EXERCISE )-REVISION EXERCISE (MOVING CHANGES & MEGNETISM)
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  16. A circular coil of radius 2R is carrying current 'i' . The ratio of ma...

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