Chapter 25, Problem 61A

To determine

The direction of the induced current in the wire.

Explanation of Solution

Introduction:

Faraday’s law of electromagnetic induction states that if a conductor is placed in a changing magnetic field, an EMF is induced which leads to flow of current called induced current. The direction in which the current is induced can be determined by Fleming’s right hand rule.

The rule states that if the thumb points towards the direction in which the wire is moving and the fingers point towards the direction of the magnetic field, the palm of the right hand will point towards the direction of the induced conventional current. Butthe current is only induced when the motion of the wire is relative to the magnetic field. If they are parallel to each other, no current is induced as it does not cut any magnetic flux lines.

Here, as the motion of the conductor is in the direction of the magnetic field, no current is induced in the wire.

Conclusion:

As the motion of the conductor is in the direction of the magnetic field no current is induced in the wire.