A cathode-ray tube (CRT) is an evacuated glass tube. Electrons are produced at one end, usually y the heating of a metal. After being focused electromagnetically into a beam, they are accelerated through a potential difference, called the accelerating potential. The electrons then strike a coated creen, where they transfer their energy to the coating through collisions, causing it to glow. CRTS re found in oscilloscopes and computer monitors, as well as in earlier versions of television creens. a) If the accelerating potential is 95.0 V, what is the change in the electric potential energy of the electrons when they accelerated through the potential? (b) If the electrons are accelerated from rest, then what is the kinetic energy of the electrons before they strike the coated screen? (c) If the accelerating potential occurs between parallel metal plates separated by 10.0 cm, then what is the initial acceleration of the electrons when they enter this accelerating potential?

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3. A cathode-ray tube (CRT) is an evacuated glass tube. Electrons are produced at one end, usually
by the heating of a metal. After being focused electromagnetically into a beam, they are accelerated
through a potential difference, called the accelerating potential. The electrons then strike a coated
screen, where they transfer their energy to the coating through collisions, causing it to glow. CRTS
are found in oscilloscopes and computer monitors, as well as in earlier versions of television
screens.
(a) If the accelerating potential is 95.0 V, what is the change in the electric potential energy of the
electrons when they accelerated through the potential?
(b) If the electrons are accelerated from rest, then what is the kinetic energy of the electrons before
they strike the coated screen?
(c) If the accelerating potential occurs between parallel metal plates separated by 10.0 cm, then
what is the initial acceleration of the electrons when they enter this accelerating potential?
Transcribed Image Text:3. A cathode-ray tube (CRT) is an evacuated glass tube. Electrons are produced at one end, usually by the heating of a metal. After being focused electromagnetically into a beam, they are accelerated through a potential difference, called the accelerating potential. The electrons then strike a coated screen, where they transfer their energy to the coating through collisions, causing it to glow. CRTS are found in oscilloscopes and computer monitors, as well as in earlier versions of television screens. (a) If the accelerating potential is 95.0 V, what is the change in the electric potential energy of the electrons when they accelerated through the potential? (b) If the electrons are accelerated from rest, then what is the kinetic energy of the electrons before they strike the coated screen? (c) If the accelerating potential occurs between parallel metal plates separated by 10.0 cm, then what is the initial acceleration of the electrons when they enter this accelerating potential?
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