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A straight wire of mass 200 g and length...

A straight wire of mass 200 g and length 1.5 m carries a current of 2 A. It is suspended in mid-air by a uniform horizontal magnetic field B. What is the magnitude of the magnetic field?

Text Solution

Verified by Experts

Here, `m=200g=0*200kg`,
`I=2A, l=1*5m`.
For mid air suspension, `mg=BIl`
or `B=(mg)/(Il)=(0*200xx9*8)/(2xx1*5)=0*65T`
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