NEET Physics (general) MCQ Question
Which of the following statements about magnetic fields and current-carrying conductors is correct?
The magnetic field at every point on a circle of radius r around a straight current-carrying wire is uniform in magnitude.
The introduction of a shunt resistance in a galvanometer increases its sensitivity to measure small currents.
A planar coil of irregular shape generates a magnetic field that is different in magnitude compared to a circular coil of the same area.
The magnetic field around a long straight conductor decreases with increasing distance from the wire.
Correct Answer
Detailed Explanation
Statement A is correct as it reflects the uniformity of the magnetic field around a straight wire. Statement B is incorrect as shunt resistance decreases sensitivity, C is incorrect because the shape does not affect the enclosed area, and D is incorrect because the magnetic field strength is inversely proportional to distance.
Found an issue with this question?