question_answer

Draw the pattern of magnetic field lines around a current carrying straight conductor. How does the strength of the magnetic field produced change:

(i) with the distance from the conductor?

(ii) with an increase in current in a conductor?

Answer:

(i) The strength of a magnetic field is inversely proportional to the square of the distance from the conductor i.e., strength of an electric field decreases with increase in distance.

(ii) The strength of the magnetic field is directly proportional to the current passing in the wire i.e., strength of the magnetic field increases with the increase in current.