Question

Which of the following correctly describes the magnetic field near a long current carrying straight wire?

• A. The field consists of straight lines perpendicular to the wire.
• B. The field consists of straight lines parallel to the wire.
• C. The field consists of radial lines originating from the wire.
• D. The field consists of concentric circles centered at the wire.

Answer 1

The correct option is D The field consists of concentric circles centered at the wire.

Magnetic fields due to a long current carrying straight wire are concentric circles centered at the wire.


Hence, option $\left(D\right)$ is the correct answer.