A wire carrying current I and length l is placed in a uniform magnetic field of magnitude B in such a manner that the wire is suspended in air due to the magnetic force. The mass of the wire is:
A
BIlg
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B
Blg
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C
gBIl
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D
BIlg
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E
BIl
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Solution
The correct option is DBIlg Here the weight (mg) of the object is balance by the magnetic force FB=BIL