Question
Asked Dec 27, 2019
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A magnetic field can deflect a beam of electrons, but it cannot do work on the electrons to change their speed. Why?

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Expert Answer

Step 1

From the equation (I), it can be seen that the magnitude of the force depends on the angle between the direction of the charge particle and the magnetic field. This angle ranged between 0° to 90°, and maximum at the theta = 90°. The force acting on the electron due to the magnetic f...

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