The diagram below shows a cathode ray tube in which the arrow indicates a beam of charged particles approaching an electric field between the plates A and B. What will happen to the beam when it passes through the electric field?

Will pass undeflected

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Will deflect towards B

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Will have circular motion in between A and B

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Will deflect towards A

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Solution

The correct option is C Will deflect towards A
Cathode Ray Tube (CRT) is an apparatus used as a display device in televisions and computers. It is essentially made up of 4 parts:
1. Electron Gun
2. Focussing and Accelerating Anodes
3. Horizontal and Vertical Deflection Plates
4. Evacuated Glass Envelopes
Electron gun is used to produce stream of charged electrons. Since, the beam is a stream of charged electrons, it will be deflected towards A (positively charged plate)

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