Magnetic field produced by a wire is

Correct option is C

Correct Answer: C. Forms circular loops along the axis of wire and coplanar to the wire

• When electric current flows through a straight conductor, it produces a magnetic field.

• The magnetic field lines form concentric circular loops around the wire.

• These loops lie in planes perpendicular to the wire (i.e., coplanar to each circular loop).

• The direction of the magnetic field is given by the Right-Hand Thumb Rule:

  • Thumb points in the direction of current.

  • Fingers curl in the direction of magnetic field lines.

• Option A is incorrect because the magnetic field is not parallel along the axis but circular around the wire.

• Option B: Magnetic field is perpendicular to the wire but not necessarily to the entire plane of the wire.

• Option D: Direction is constant for a given point around the wire but changes as you move around the wire, following circular paths.

• This concept is fundamental in electromagnetism and is used in devices like solenoids and electromagnets.