Question
Science Question on Magnetic Field And Field Lines
Which of the following correctly describes the magnetic field near a long 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 centred on the wire.
Answer
The field consists of concentric circles centred on the wire.
Explanation
Solution
The magnetic field lines, produced around a straight current-carrying conductor, are concentric circles. Their centres lie on the wire.
So, the correct option is (D): The field consists of concentric circles centred on the wire