Question

When using the right-hand rule to determine the direction of the magnetic field around a current-carrying wire, the
_____ of the right hand must point in the direction of the current.

Answer 1

Answer:

Thumb

Explanation:

The direction of the magnetic field can be determined by using the right-hand rule. According to this rule, hold a current carrying wire in your right hand such that the thumb of the right-hand point in the direction of electric current. The curled finger gives the direction of the magnetic field.

Hence, the thumb shows the electric current.                            

Answer 2

Answer:

The thumb of the right hand must point in the direction of the current.

Explanation:

The right hand rule is used to find the direction of magnetic field around a current-carrying wire. In this rule, it is consider to hold a current carrying wire in your right hand such that the thumb shows the direction of current. The curled finger gives the direction of magnetic field.

For example, if the current points in northward direction, then the direction of magnetic field is in anticlockwise direction.