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The direction of the magnetic field in a certain region of space is determined by firing a test charge into the region with its velocity in various directions in different trials. The field direction is: A. one of the directions of the velocity when the magnetic force is zero B. the direction of the velocity when the magnetic force is a maximum C. the direction of the magnetic force D. perpendicular to the velocity when the magnetic force is zero E. none of the above |
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Answer» A. one of the directions of the velocity when the magnetic force is zero |
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