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3. In 1934, television sets with cathode-ray tubes (CRT) were first manufactured in Germany. It became popular from time to time with several adjustments at CRT. Surprisingly, this CRT technology managed to make the TV screen appeared with colours instead of black and white. The people around that time were happy to watch a TV with colours. With the diagrams below, you need to explain how this CRT

3. In 1934, television sets with cathode-ray tubes (CRT) were first manufactured in Germany. It became popular from time to time with several adjustments at CRT. Surprisingly, this CRT technology managed to make the TV screen appeared with colours instead of black and white. The people around that time were happy to watch a TV with colours. With the diagrams below, you need to explain how this CRT

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3. In 1934, television sets with cathode-ray tubes (CRT) were first manufactured in Germany. It became popular from time to time with several adjustments at CRT. Surprisingly, this CRT technology managed to make the TV screen appeared with colours instead of black and white. The people around that time were happy to watch a TV with colours. With the diagrams below, you need to explain how this CRT technology is possible to create the colours on the TV screen and you need to explain what will happen to the CRT technology if a strong magnet is brought near the screen. Anode Deflecting coils Control Grid (a) (b) (c) (d) Fluorescent screen Heater Cathode Electron beam Focusing coil a) What will happen to the cathode when it is heated? b) What will happen to electrons when it passed through the focusing coil? Explain. c) What will happen to the electrons when it passed through the deflecting coil? Explain. d) What will happen to the electrons when it hit the fluorescent screen? Explain. e) Explain what will happen to the CRT technology if a strong magnet is brought near the screen. f) Given the velocity of the electrons is constant, how to increase the deflection of electrons?
Transcribed Image Text:3. In 1934, television sets with cathode-ray tubes (CRT) were first manufactured in Germany. It became popular from time to time with several adjustments at CRT. Surprisingly, this CRT technology managed to make the TV screen appeared with colours instead of black and white. The people around that time were happy to watch a TV with colours. With the diagrams below, you need to explain how this CRT technology is possible to create the colours on the TV screen and you need to explain what will happen to the CRT technology if a strong magnet is brought near the screen. Anode Deflecting coils Control Grid (a) (b) (c) (d) Fluorescent screen Heater Cathode Electron beam Focusing coil a) What will happen to the cathode when it is heated? b) What will happen to electrons when it passed through the focusing coil? Explain. c) What will happen to the electrons when it passed through the deflecting coil? Explain. d) What will happen to the electrons when it hit the fluorescent screen? Explain. e) Explain what will happen to the CRT technology if a strong magnet is brought near the screen. f) Given the velocity of the electrons is constant, how to increase the deflection of electrons?
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