A current flows downwards in a wire that passes vertically through a table top. Will the magnetic field lines around it go clockwise or anticlockwise when viewed from above the table?

A current-carrying straight wire is held in exactly vertical position. H the current passes through this wire in the vertically upward direction, what is the direction of magnetic field produced by it? Name the rule used to find out the direction of magnetic field.

For the coil in the diagram below, when the switch is pressed:

(a) What is the polarity of end A?

(b) Which way will the compass point then?

The directions of current flowing in the coil of an electromagnet at its two ends X and Y are as shown below:

(a) What is the polarity of end X?

(b) What is the polarity of end Y?

(c) Name and state the rule which you have used to determine the polarities.

The magnetic field associated with a current-carrying straight conductor is in anticlockwise direction. H the conductor was held along the east-west direction, what will be the direction of current through it? Name and state the rule applied to determine the direction of current?