Verified answer

Answer:

B) Zero

Explanation:

When the plane of the coil is at right angles to the plane of the permanent magnet, the magnetic field lines will pass through the coil in a direction that is parallel to the axis of the coil. This means that the magnetic flux through the coil will be zero, and therefore no emf will be induced in the coil. As a result, no current will flow in the coil and no force will be experienced by the coil on the passage of electric current.

Answer:

The correct answer is (b) zero.

Explanation:

When a coil is held in a magnetic field such that the plane of the coil is at right angles to that of the magnetic field, no force is experienced by the coil on the passage of electric current. This is because the magnetic field does not have any effect on the current flowing in the coil when the plane of the coil and the magnetic field are perpendicular to each other. The force experienced by the coil depends on the interaction between the magnetic field and the current flowing in the coil, and this interaction is dependent on the relative orientation of the magnetic field and the current.

In this case, as the plane of the coil and the magnetic field are at right angles, the magnetic field has no effect on the current flowing in the coil, and therefore, no force is experienced by the coil. If the plane of the coil were parallel to that of the magnetic field, the force experienced by the coil would be maximum. If the plane of the coil were at an angle other than 0 or 90 degrees to that of the magnetic field, the force experienced by the coil would be a weak one.

In conclusion, the force experienced by a coil in a magnetic field depends on the relative orientation of the magnetic field and the current flowing in the coil. When the plane of the coil and the magnetic field are perpendicular, no force is experienced by the coil.

@SPJ2