Discovery of Electron || in HINDI

In this Physics video lecture in Hindi we are going to discuss on the cathode ray discharge tube experiment which led us to the discovery of electron.
In mid 1850s many scientists mainly Faraday began to study electrical discharge in partially evacuated tubes, known as cathode ray discharge tubes. It is depicted
in the figure in the thumbnail. A cathode ray tube is made of glass containing two thin pieces of metal, called electrodes, sealed in it. The electrical discharge through the gases could be observed only at very low pressures and at very high voltages. The pressure of different gases could be adjusted by evacuation of the glass tubes. When sufficiently high voltage is applied across the electrodes, current starts flowing through a stream of particles moving in the tube from the negative electrode (cathode) to the positive electrode (anode). These were called cathode rays or cathode ray particles. The flow of current from cathode to anode was further checked by making a hole in the anode and coating the tube behind anode with phosphorescent material zinc sulphide. When these rays, after passing through anode, strike the zinc sulphide coating, a bright spot is developed on the coating [figure in the thumbnail].
The results of these experiments are summarised below.
(i) The cathode rays start from cathode and move towards the anode.
(ii) These rays themselves are not visible but their behaviour can be observed with the help of certain kind of materials (fluorescent or phosphorescent) which glow when hit by them.
(iii) In the absence of electrical or magnetic field, these rays travel in straight lines.
(iv) In the presence of electrical or magnetic field, the behaviour of cathode rays is similar to that expected from negatively charged particles, suggesting that the cathode rays consist of negatively charged particles, called electrons.
(v) The characteristics of cathode rays (electrons) do not depend upon the material of electrodes and the nature of the gas present in the cathode ray tube.
Thus, we can conclude that electrons are basic constituent of all the atoms.

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TH-cam पर ना जाने कितनी वीडियो है। मैं भी एक छोटा सा creater हु पर आपका वीडियो देखकर ही मेरी समझ बढ़ती है आपका इन सारे शानदार वीडियो के लिए आपका बहुत बहुत thanks.
Thankyou so much sir. एक बार फिर आपके बारे में कहने के लिए मेरे पास शब्द कम पड़ जाएंगे।

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Viewers may also visit 'Learner's Console' for this chapter too 🙏

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[@gameingking1044]

Thank you sir help me so much please discover proton

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[@madhumishra4776]

I have one doubt sir
From where were these electrons coming ?.. What was their origin point? What exactly caused them to dissociate from the atoms in which they were present and to move towards the anode ?

[@pulkitgandhi9545]

there was gas in the tube, electricity dissociated electrons from the atom.

[@khansolevishal4761]

the first cathode ray experiment was done in 1858 or 1854.. or late 1870s... I'm not confirmed about date but it was before 1870.. and we all know that Ammeter was invented by Friedrich Dexler in the year 1884. So how ammeter came in cathode ray experiment which which was done before 1870... I have serious doubt 🧐 plz guys help me if you know...!

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Cathode negative how ? Plz explain and anode posituve

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P

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[@dhruvyadav2244]

4:29 ....here why they didnt get glow because of proton....as simultaneously ....proton(anode ray) also flow from anode to cathode .....so a glow should be seeen in Zinc sulphine behind cathode ......So can anyone explain this ?

[@mister_gravity7350]

​@@dhruvyadav2244 proton present in nucleus and they are bounded by nuclear force , so proton can't be emitted by applying electric field . For proton emissions nuclear reaction need to be conduct but electron can be emitted from metal surface in high electric field so only electron was flow from cathode to anode not proton from Anode to cathode.
I hope ,you got it.

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nice sir plzz make continuity in this topic I mean order me electron, proton ,neucleon,neucleous, atom sbki inventory

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[@ammarkhan2927]

Sir you said that there was not any glow behind the cathode when cathode was perforated. So where are the positive particles. they have to pass the cathode and they would cause fluorescence and that's how protons were discovered.

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[@harshGupta-ur7vj]

@@sonalipriyadarshanisahoo5340 it was first observed by William crooks but later by applying electric by J.J.Thomson,it was proved...
So the real discoverer of electron was J.J.Thomson

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Pls 11th n 12th chemistry k sabhi topics k sath unse related competitive quesns series bhi tyar kijiye

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Thankyou

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Books se kuch clear nhi ho rha tha but aapke video se bht kuch clear ho gya.....
THANKS...

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Why electrons just passed through anode????
Why they didn't stuck there???(-particle & +elecrode)

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[@abhayupadhyay8740]

It also stric on anod but visible on back only as there was Zink sulfit was coated

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Because of coating with florescent....

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@@AhmadRaza-li9hb so u mean that electrons only strike not stuck due to coating?

[@Julian-sy5pp]

Kuch particles sirf waha se flow hue aur anode me ek chhed nahi hai balki bohot se chhed hai isliye - + se attract hokar uski taraf badhta hai aur chhed se nikal jata hai

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Sir negative charge hi positive charge ki taraf kyun attract hota he positive charge kyun negative charge ki taraf attract nehin hota

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Wo uski Marzi 😂😅

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Because only negative charges be in free state...

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Can u pls make an video on nuclear packing fraction , packing fraction per nucleon and relation ship between packing fraction and BE 🙏🏻

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Those videos will come at right time.
Physics class 12 part 2 Nuclear Physics

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Sir you rocked it.
Mujhe ye concept bahut ache se samajh aaya
Thanku so much sir.

[@JaatLive6.626]

Sir one more thing sir cathode banane ke liye vo uske shape or size ke upper depend nhi hai per usko banane ke liye usko banaya kis material se hai vo depend kerta hai

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No

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Absolutely amazing teaching.......................Thank you sir.....🙏

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0:37 not big step for mankind but big step for increasing syllabus of students 😂😂

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You cover this complex topic in very easy way

[@mr.ansari2206]

You are explain discovery of electron's behaviour.Please explain discovery of electron.
Title name and explanation is not same

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[@ajoydutta4788]

Sir , ammeter do not show any deflection
Deflection is shown by galvanometer

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Bro you are true but sir discharge tube ki baat kar rahe hain aur ammeter dikhata hain ki current pasa ho raha hain ki nahi galvanometer to sirf current ka presence dikhata hai

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thank you sir , this video helped me a lot

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Thank u sir .....so much helpful it was very hard in textbook 🙂
Sir, can u also make video on proton? Pls.....

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I understand Discovery of Electron , thanx 4 understanding.

[@poojayadav3826]

Sir proton ki discovery me anode Ray cathode ke piche lagne wale flouresent material se hit huye to apne kaha jab scientist ne cathode me hole kiya to zinc sulphide glow nahi huya why???

[@umerfaizan3671]

Mera bhi yehi question tha but humary sir nay yeh electron ki discovery may cathode ki perforation ka kuch nahi bataya.Unho nay kaha k rays cathode say anode ki taraf ja rahi thin, yeh aisy pata Chala k in par negative charge tha

[@trooptorque2675]

Because flow is from cathode to anode

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243 dislikes are those electrons which didn't get accepted 😂

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Achha se samajh aa gaya sir teacher ho to aapke jaisa sir THANK YOU

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I felt that no one else teach like that by using ametre

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Excellent explaination thank you so much sir for this helpful video ......