Discussion Forum



1)

The magnetic field at a point due to a current carrying conductor is directly proportional to


A) resistance of the conductor

B) thickness of the conductor

C) current flowing through the conductor

D) distance from the conductor

Answer:

Option C

Explanation:

The magnetic field produced due to a current-carrying conductor has the following characteristics:

  • It encircles the conductor.
  • It lies in a plane perpendicular to the conductor.
  • The reversal in direction of current flow reverses the direction of the field.
  • The strength of the field is directly proportional to the magnitude of the current.
  • The strength of the field at any point is inversely proportional to the distance of the point from the wire.

So c is the answer