A conductor carrying a current in a magnetic field experiences a force given by

ID: 1777476 • Letter: A

Question

A conductor carrying a current in a magnetic field experiences a force given by the Lorentz equation. It might be written

How must the wire be oriented in the magnetic field so that it does not experience a force at all?

The wire has to be perpendicular to the field

The wire has to be parallel to the field with the current going in either direction in the wire.

The wire has to be parallel to the field with the current going opposite to the field.

There is no direction in which the force is zero.

The wire has to be perpendicular to the field

The wire has to be parallel to the field with the current going in either direction in the wire.

The wire has to be parallel to the field with the current going opposite to the field.

There is no direction in which the force is zero.

F = q ( v x B) = qvBsintheta

F = I ( L x B) = ILBsintheta

force will be zero if L and B are parallel or 180 degree because sin0 and sin180 = 0

C option

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