Cathode rays enter into a uniform magnetic field perpendicular to the direction of the field. In the magnetic field their path will be(a) Straight line(b) Circle(c) Parabolic(d) Ellipse
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d) ellipse is correct
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I think its option (b) circle
F= q(v × B)
thus magnetic force is centripetal in nature. so the path of cathode ray particals in magnetic field when projected normal to the field circular.
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