An infinitely long current carrying wire and a small current carrying loop are in the plane of the paper as shown. The radius of the loop is a and distance of its centre from the wire is d d ≫ a . If the loop applies a force F on the

Question

An infinitely long current carrying wire and a small current carrying loop are in the plane of the paper as shown. The radius of the loop is a and distance of its centre from the wire is d d &#8811; a . If the loop applies a force F on the wire then:

Quantrex Academy · Accepted Answer

Correct answer: A. F ∝ a d 2

U = - P → . B - F = - ∂ U ∂ r = P d B d r F = i 2 π a 2 × d d r μ 0 i 1 2 π r F = i 1 i 2 π 0 a 2 2 1 r 2 F ∝ a r 2 As r = d F ∝ a 2 d 2

An infinitely long current carrying wire and a small current carrying loop are in the plane of the paper as shown. The radius of the loop is a and distance of its centre from the wire is d d ≫ a . If the loop applies a force F on the wire then:

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Correct answer

Step-by-step solution

More from Magnetic Effects of Current

An infinitely long current carrying wire and a small current carrying loop are in the plane of the paper as shown. The radius of the loop is a and distance of its centre from the wire is d d &#8811; a . If the loop applies a force F on the wire then:

Options

Correct answer

Step-by-step solution

More from Magnetic Effects of Current

An infinitely long current carrying wire and a small current carrying loop are in the plane of the paper as shown. The radius of the loop is a and distance of its centre from the wire is d d ≫ a . If the loop applies a force F on the wire then: