AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(C) Increase
The magnetic field at a fixed point near a straight current-carrying conductor increases when the current through it is increased.
The magnetic field produced by a current-carrying conductor is directly proportional to the current flowing through it. As shown in Activity 12.1 and 12.4 (Chapter 12), greater current produces a stronger magnetic effect. So more current → stronger field. Examiner expects you to simply select (C) with a one-line justification.