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  4. When a magnetic field is applied in a direction perpendicular to the direction of cathode rays, then their:-

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Q. When a magnetic field is applied in a direction perpendicular to the direction of cathode rays, then their:-

NTA AbhyasNTA Abhyas 2020

Solution:

Since force is perpendicular to direction of motion. So, work done by magnetic force is zero. Hence, energy and magnitude of momentum remains constant.