Question

Which of the following statements is/are true for a current carrying straight conductor?

1. i) The magnetic field lines are concentric circles with conductor at the centre.
2. (ii) The strength of the magnetic field increases as we move away from the conductor.
3. (iii) The direction of magnetic field can be determined using right hand thumb rule.

• A. None of these
• B. i, iii
• C. i only
• D. All

Answer 1

Answer:

B. i, iii

• Statement (i) is true.

• The magnetic field lines around a straight current-carrying conductor are concentric circles with the conductor at the center.

• Statement (ii) is false.

• The strength of the magnetic field decreases as we move away from the conductor.

• Statement (iii) is true.

• The direction of the magnetic field can be determined using the right-hand thumb rule