Discussion
In a color television set using a picture tube a high voltage is used to accelerate electron beams to light the screen. That voltage is about...?
Answer: C
A colour picture tube uses about 25,000 volts to accelerate the electron beams.
The flyback transformer generates it. At that energy the electrons excite the phosphors brightly enough to be seen in daylight, and the tube also emits some X-rays, which the leaded glass absorbs.
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