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In a cathode ray tube, electric and magn...

In a cathode ray tube, electric and magnesity of the magnetic fields are simultaneously applied at right angles to each other and the intensity of the magnetic field is so adjusted that the beam remains undeflected. Show that the velocity of cathode ray particles is given by `v=E/B`. Calculate this velocity when `B=0.01 T` and `E=50,000 V//m`.

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NN GHOSH-INTRODUCTION TO MODERN PHYSICS-EXERCISE
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