Find an expression for the strength and direction of the magnetic field B⃗ .?

NetherCraft 0

In the following figure, a long, straight, current-carrying wire of linear mass density μ is suspended by threads. A magnetic field perpendicular to the wire exerts a horizontal force that deflects the wire to an equilibrium angle θ.

A) Find an expression for the strength and direction of the magnetic field B⃗ .

B= ???

B) What B⃗ deflects a 51 g/m wire to a 13 ∘ angle when the current is 9.0 A ?

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B= ???

I know the field is down.

1 Answer

  • A) ((mu)gsin(theta))/ cos(theta)I

    B) 13 mT

    [C) ] Down is correct


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