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A wire of mass 100 g, length 1 m and cur...

A wire of mass 100 g, length 1 m and current 5 A is balanced in mid air by a magnetic field B, then find the value of B.

A

0.2 T

B

0.1 T

C

0.5 T

D

0.6 T

Text Solution

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The correct Answer is:
A
Balancing the forces Fg = Fb mg= iBl 0.1*10 =5*B*1 B=0.2T
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