• 2022-06-06 问题

    Electric field lines A: are trajectories of a test charge B: are vectors in the direction of the electric field C: form closed loops D: cross each other in the region between two point charges E: are none of the above

    Electric field lines A: are trajectories of a test charge B: are vectors in the direction of the electric field C: form closed loops D: cross each other in the region between two point charges E: are none of the above

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