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Questions  

Two infinitely long straight parallel wires carry equal currents ‘i’ in the same direction and are 2 m apart. Magnetic induction at a point which is at same normal distance 2 m from each wire has magnitude 

a
μ0i2π2
b
μ0i4π2
c
μ0i22π
d
μ0i2π

detailed solution

Correct option is D

In three dimensional space, the point lies perpendicular to the plane containing wires. Let θ be the half-angle made by position vector of particle with vertical. Thensinθ=12⇒θ=45° If field due to each wire is BBnet =2Bcosθ Bnet =2μ0i2π212=μ0i2π

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Similar Questions

Two circular coils X and Y, having equal number of turns and carrying currents in the same sense, subtend same solid angle at point O. If the smaller coil X is midway between O and Y and if we represent the magnetic induction due to bigger coil Y at O as By and that due to smaller coil Y at O as Bx, then find the ratio Bx/By.

 


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