Uniform Electric Field (7 of 9) Kinetic Energy of an Electron thru a Potential Difference

Shows how to calculate the kinetic energy of an electron as it moves through a potential difference.

When two metallic plates are set a distance apart and then are attached to a potential difference, a battery for example, one plate will have a positive charge and the other plate will have a negative charge. The electric field will be directed away from the positive plate and toward the negative plate. The electric field between the plates is uniform throughout. That means the electric field strength is the same everywhere inside the parallel plates. Only at the ends of the plates will it show a non-uniform field. Such a system can be referred to as a parallel-plate capacitor.

Work must be done to move charges from one plate to another. The work can be done on the charged particle either by an external force or by the electric field. The work done on the particle will be equal to the potential energy given to the particle. Using the law of conservation of energy (initial potential energy = final kinetic energy) the velocity of the charged particles can be determined. The acceleration of the charged particle in the electric field can be calculated using newton's second law. Because there is a uniform electric field between the plates, the charged particle will experience uniform acceleration.

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[elimurflo]

I was looking for this for half an hour, thank you very much

[VijayRob]

Thanks for the vid! Does this mean that the change in work is 0, as the Potential Enegery converted right into KE?

[saicharan]

I think i am really late but you are a life saver! Thank you very much for your detailed explanation.

[rihamission]

Why didn't we put a negative sign before electron's charge? Why did we use only the magnitude of electron's charge and not it's polarity?

[ruthnouboussi]

I have my physics midterm tomorrow and I did not get this s***...until now. Thank you much Sir.

[daniellewis]

How is the variable d involved, the separation between the plates? You didn't use it in any of the equations, why is it there? Is it used somewhere else?

[MrQawdhan]

the work wouldn't be a negative right there. because the other way back to the negative plate would be a positive for the work. thank, you sir for your help. I like your videos and the way you explain things.

[eternallong]

Hi what if we want to find out that the charge will hit the plate or not

[edisonz]

How do I calculate the velocity of the electron?

[harshita-jxnk]

Can the same formula be used to calculate the energy of a photon? (Given the potential)

[rainier_graeme_nii]

Please can u show at what speed it will be after accelerating???

[lawliet]

OH MYYYY! THANKS SO MUCH SIR! REALLY REALLY APPRECIATE YOUR WORK

[muss]

you helped me so much... thank you!!!!

[bengalifoodcooking]

Thank you so much it was really helpful..

[ShamsherSingh-wmee]

Potential difference should have been negative as Change in potential energy will be negative.????

[pawanjoshi]

Sir will it move with the same velocity

[okonjiijeawele]

what if they asked for the KE halfway to the other side

[FlyEagle]

hey
great Video! loved the comparison you drew to graviational forces!

[comicstwisted]

Why isn't the change in potential difference negative since at its initial position it's 23, 500 VoLTs and at final it's 0, so 0-23, 500= -23, 500

[no_more_free_nicks]

I did not understand your video, this is because I was drinking wine, and playing a game, while listening to what you say :)