Answer:
The thumb of the right hand must point in the direction of the current.
Step-by-step 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.