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  4. In a Cathode Ray Tube (CRT), how do electrons flow back to the anode?
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In a Cathode Ray Tube (CRT), how do electrons flow back to the anode?

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Offline theThinker (OP)

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In a Cathode Ray Tube (CRT), how do electrons flow back to the anode?
« on: 15/09/2017 10:09:43 »
Cathode Ray Tube, Electron Supply?

In a TV CRT, electrons from the cathode go past the anode and strike the TV screen to produce the picture. It seems that, in order to for the system to work, the electrons hitting the screen must be redirected back to the anode to complete the electrical circuit.

I'd like to known how such a circuit is actually done in a CRT?
« Last Edit: 18/09/2017 09:13:45 by chris »
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Offline RD

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Re: In a Cathode Ray Tube (CRT), how do electrons flow back to the anode?
« Reply #1 on: 15/09/2017 11:00:53 »
Quote from: theThinker on 15/09/2017 10:09:43
the electrons hitting the screen must be redirected back to the anode to complete the electrical circuit.

Via conductive-paint on the inside of the glass CRT.
« Last Edit: 15/09/2017 11:04:07 by RD »
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Offline theThinker (OP)

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Re: In a Cathode Ray Tube (CRT), how do electrons flow back to the anode?
« Reply #2 on: 15/09/2017 11:02:21 »
Quote from: RD on 15/09/2017 11:00:53
Quote from: theThinker on 15/09/2017 10:09:43
the electrons hitting the screen must be redirected back to the anode to complete the electrical circuit.

Via conductive-paint on the inside of the glass CRT tube.
Many thanks.
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Offline Colin2B

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Re: In a Cathode Ray Tube (CRT), how do electrons flow back to the anode?
« Reply #3 on: 15/09/2017 11:26:18 »
Quote from: RD on 15/09/2017 11:00:53
Via conductive-paint on the inside of the glass CRT.
There is also an earthed conductive coating on the outside of the bell part of the tube, capacitance effect with internal coating dissipates some charge. Also residual charge not mopped up by the coatings bleeds through to front of screen and dissipates into air - you can feel this as static if you put your hand close to screen.
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Tags: cathode ray tube  / crt  / electrons  / anode  / cathode 
 
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