Question

Consider the following statements about magnetic field due to a current-carrying straight conductor: Which of the above statements is/are correct?

1. (a) The direction of the south pole of a compass needle at a point gives the direction of the magnetic field at that point.
2. (b) The direction of the magnetic field lines gets reversed if the direction of the current in the conductor is reversed.

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

Answer 1

Answer:

B. ii only

Only statement (b) is correct. The direction of the magnetic field lines gets reversed if the direction of the current in the conductor is reversed.