explain CRT and USD (mcq)
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Answer:
A cathode-ray tube (CRT) is a vacuum tube containing one or more electron guns, the beams of which are manipulated to display images on a phosphorescent screen. The images may represent electrical waveforms (oscilloscope), pictures (television set, computer monitor), radar targets, or other phenomena.
A cathode-ray tube (CRT) is a vacuum tube containing one or more electron guns, the beams of which are manipulated to display images on a phosphorescent screen. The images may represent electrical waveforms (oscilloscope), pictures (television set, computer monitor), radar targets, or other phenomena.
USD may refer to any of the following:
1. USD is an abbreviation for United States Dollar, the official currency of the United States.
2. USD is a common misspelling of USB (universal serial bus), a type of bus and port on a computer.
3. USD is a misspelling of the word used.