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Which of the following correctly describ...

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.

Text Solution

Verified by Experts

The magnetic field lines near a long straight wire carrying current are concentric circles centred on the wire. So, choice (d) is correct.
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Knowledge Check

  • Which of the statements given below correctly describes the magnetic field near a long, straight current carrying conductor ?

    A
    The magnetic lines of force are in a plane, perpendicular to the conductor in the form of straight lines.
    B
    The magnetic lines of force are parallel to the conductor on all the sides of condutor .
    C
    The magnetic lines of force are perpendicular to the conductor going radiadly outward.
    D
    The magnetic lines of force are in concentric circles with the wire as the centre , in a plane perpendicular to the conductor .

  • The strength of the magnetic field around a long straight wire, carrying current, is

    A
    inversely proportional to the distance from the wire
    B
    inversely proportional to the square of the distance from the wire
    C
    directly proportional to the square of the distance
    D
    directly proportional to the distance from the wire

  • The direction of magnetic field produced around a long straight conductor is given by

    A
    right hand thumb rule.
    B
    left hand thumb rule.
    C
    right hand screw rule.
    D
    both A and C

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