Question: An electron is accelerated through a potential difference of 1.0 kV and directed into a region between two parallel plates separated by 20 mm with

An electron is accelerated through a potential difference of 1.0 kV and directed into a region between two parallel plates separated by 20 mm with a potential difference of 100 V between them. The electron is moving perpendicular to the electric field when it enters the region between the plates. What is the magnitude and direction of the uniform magnetic field required to ensure that the electron travels in a straight line?

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