Cathode Ray Tube
Cathode Ray Tube#
A cathode ray tube (CRT) is a device that produces a focused beam of electrons in a vacuum. The electrons strike a phosphor-coated glass screen at the end of the tube, which produces a bright spot of light. The position of the bright spot on the screen can be adjusted by deflecting the electrons with electrical fields, magnetic fields, or both.
Consider a CRT with an electron beam average current of 20 \(\rm\ \mu A\). How many electrons strike the screen every 4 minutes?
Please enter in a numeric value.
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