Question

1. 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 concentric circles centered on
the wire
(1)​

Answer 1

Answer:

As per the thumb rule of magnetism and electricity, a current carrying wire or conductor which is straight produces concentric circles of the magnetic field.

Thus the choice "d” in the specified question is right.

Whenever current is produced in any type of conductor some magnetic fields are observed around it.

Explanation: