A current element I d l produces a magnetic field dB at a point P, located at a distance r from the element, with an angle θ between the element and the line joining the element to P. If μ0 = 4π × 10^

Question

A current element I d l produces a magnetic field dB at a point P, located at a distance r from the element, with an angle θ between the element and the line joining the element to P. If μ0 = 4π × 10^-7 T m A^-1 and the current I is 3 A, what is the magnitude of dB if d l = 0.2 m, r = 0.5 m, and θ = 90°?

A

2 × 10^-7 T

B

4 × 10^-7 T

C

8 × 10^-7 T

D

6.0 × 10^-7 T

Accepted Answer

4 × 10^-7 T

Answer

2 × 10^-7 T

Answer

8 × 10^-7 T

Answer

6.0 × 10^-7 T

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