An electron beam moves toward a cathode ray tube screen, which is 50 cm away from...

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Physics

An electron beam moves toward a cathode ray tube screen, whichis 50 cm away from the negative electrode. The electrons areaccelerated by a potential difference of 18 kV. Estimate themaximum displacement of the electron beam caused by Earth'smagnetic field. The average magnetic field at the surface of Earthis roughly BE = 45×10−6T. Δz = ?

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