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How is the electron beam focused to a fine spot on the face of CRT
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written 4.5 years ago by
teamques10
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The cathode of the electron gun in the CRT is required not only to emit electrons, but also to concentrate emitted electrons into a tight beam. The cathode of the CRT consists of a small diameter nickel cap. The closed end of the cap is coated with emitting material. Because …
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