Chapter 24, Problem 55A

a.

To determine

The direction of magnetic field inside the loop.

Explanation of Solution

Introduction:

An electromagnet is a type of magnet which is made of wires wound up in a coil. When electricity is passed through the wire it produces a magnetic field.

The direction of magnetic field due to a wire carrying current can be determined by the right-hand rule.

It states that if one grabs the wire by the right hand such that the extended thumb points toward the direction of the convectional current, the fingers represent the direction of the magnetic field encircling the wire.

Therefore, the direction of the magnetic field inside the loop will be pointing inwards the plane of paper.

Conclusion:

The direction of the magnetic field inside the loop will be pointing inwards the plane of paper.

b.

To determine

The direction of magnetic field outside the loop.

Explanation of Solution

Introduction:

An electromagnet is a type of magnet which is made of wires wound up in a coil. When electricity is passed through the wire, it produces a magnetic field.

The direction of magnetic field due to wire carrying current can be determined by the right-hand rule.

It states that if one grabs the wire by the right hand such that the extended thumb points toward the direction of the convectional current, the fingers represent the direction of the magnetic field encircling the wire.

Therefore, the direction of the magnetic field inside the loop will be pointing away from the plane of paper.

Conclusion:

The direction of the magnetic field inside the loop will be pointing up, outwards from the screen.