Question

Draw a diagram to show the pattern of magnetic field lines on a horizontal sheet of paper due to a straight conductor passing through its centre and carrying current vertically upwards. Mark on it

1. the direction of current in the conductor and
2. the corresponding magnetic field lines.

State right hand thumb rule and check whether the directions marked by you are in accordance with this rule or not.

Answer 1

Right-hand thumb rule: This rule states that if you hold a current-carrying wire in your right hand with your thumb pointing in the direction of electric current flow, the direction of your fingers curl indicates the direction of the magnetic field's lines of force.

Yes, it is in accordance with the right-hand rule.