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 - When electric current is carried by a straight wire, it produces magnetic field lines in the form of concentric circles.

magnetic-field-in-a-straight-current-carrying-conductor---teachoo.jpg

  1. Class 10
  2. Chapter 13 Class 10 - Magnetic Effects of Electric Current (Term 2)

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo