Chapter 24, Problem 44A

To determine

The way to use a right-hand rule to determine the direction of the magnetic field.

Explanation of Solution

Introduction:

The motion of charges produces a magnetic field around them. In a wire, the flow of electrons also produces a magnetic field around the wire, the direction of which is determined by the right-hand rule.

Right hand rule says 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.

Conclusion:

Right hand rule says 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.