Question

Question 26
With the help of a labelled circuit diagram illustrate the pattern of field lines of the magnetic field around a current carrying straight long conducting wire. How is the right hand thumb rule useful to find direction of magnetic field associated with a current carrying conductor?

Answer 1

The pattern of field lines of magnetic field around a current carrying straight long conducting wire can be illustrated by the following diagram:

The right hand thumb rule:

In right-hand thumb rule, if we imagine that we are holding a current-carrying straight conductor in our right hand such that the thumb points towards the direction of current. Then our fingers will wrap around the conductor in the direction of the field lines of the magnetic field.