Physics
Grade-10
Easy

Question

The magnetic field lines inside a long current-carrying solenoid are approximately-

  1. Parabolic
  2. Circular
  3. Elliptical
  4. Straight

hintHint:

Solenoid is an electromagnet that is used to produce a controlled magnetic field through the coil. 

The correct answer is: Straight


    • When current passes through the wires, a magnetic field is produced. Solenoid behaves like a permanent bar magnet. Whose south and north poles are the ends from where magnetic field lines are coming in and out, respectively.
    • The magnetic field lines are parallel to the axis of the long infinite solenoid and the magnetic field does not vary along the length. The magnetic field almost seems to be a straight line.

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