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31.The motion of a charged particle can be used to distinguish between a magnetic field and electric field in a certain region by firing the charge (1) perpendicular to the field (2) parallel to the field (3) from opposite directions (4) with different speeds

Answer» 31.The motion of a charged particle can be used to distinguish between a magnetic field and electric field in a certain region by firing the charge (1) perpendicular to the field (2) parallel to the field (3) from opposite directions (4) with different speeds


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