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in 12th Physics by (6.7k points)
Consider a circular current-carrying loop of radius R in the x-y plane with centre at origin. Consider the line intergral
` ℑ (L) = |∫_(-L)^L B dl| ` taken along z-axis.
Use an appropriate Amperian loop to show that ` ℑ ∞ = μ_0I` , where I is the current in the wire.

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