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Which of the following is a correct statement? A. When a magnet is free to rotate across a pivot, its north pole points towards the geographic south pole of earth. B. The magnetic force on a current carrying straight wire placed in a magnetic field is inversely proportional to the strength of the field. C. The magnetic torque acting on a current carrying loop placed in a magnetic field is inversely proportional to the area of the loop. D. The magnetic force on a charge moving in a magnetic field is proportional to the sine of the angle between the field and the velocity. E. Similar poles attract opposite poles repel.
Sagot :
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