Chapter 25, Problem 28A

To determine

To Explain: The direction of the electric field in the wire if the wire is pulled right.

Answer to Problem 28A

The direction of the electric field will be in the upward direction.

Explanation of Solution

Introduction:

The right-hand thumb rule is used to find the direction of the magnetic field. It states that if the thumb of the right hand is in the direction of current flowing, curled fingers will notify the direction of the magnetic field.

In the diagram provided in the question, the magnetic field is shown and charges are moving towards the right side as the wire is pulled to the right-hand side.

According to the right-hand thumb rule, this means any current in the wire can move up or towards the top of the page. For the current to flow in the upward direction, the electric field must be in the upward direction.

Conclusion:

The electric field in the wire point would be in the upward direction when pulled to the right.