Questions
A long, straight wire of radius a caries a current distributed uniformly over its cross-section. The ratio of the magnetic fields due to the wires at distance and 2a. respectively from the axis of the wire is :
detailed solution
Correct option is C
At inside point P , Bp=μ0ia32πa2=μ0i6πa because i α π R2 and ix α πx2At outside point Q , Bq=μ0i2π2a∴Ratio =BpBq=23Talk to our academic expert!
Similar Questions
A long straight metal rod has a very long hole of radius ‘a ’ drilled parallel to the rod carries a current i . Find the magnetic field on axis of hole. Given C is the center of the hole and OC=c
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