A straight wire having mass of 1.2 kg and length of 1 m carries a current of 5 A. If the wire is suspended in mid-air by a uniform horizontal magnetic field, then the magnitude of field is
Text Solution
Verified by ExpertsThe correct answer is:
C
For mid-air suspension the upward force 
on wire due to magnetic field 
must be balanced by the force due to gravity, then
Here, 
,
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