Siddhart1998
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Report Thread starter 6 years ago
#1
Okay so I know the definition of the volt - joule per coulomb

and of the electronvolt - energy gained by an electron as it is accelerated through 1p.d

In calculations I've always used the same value for eV and V so 1ev = 1V and 444ev = 444V and my classmates agree you can do this plus I come out with the right answer.

But come to think about it how can 1V = 1eV.................
because eV = elementary charge * voltage
so then 1V would surely be:= (1.6*10^-19) * 1
= 1.6*10^-19eV

also the specification says eV = 1/2mv^2 as an energy transfer equation but surely the KE part would be in joules...... yet here it equals to electron-volts. I understand that the electronvolt is also a unit of energy but it needs to be converted from joules first surely.
So shouldn't it be eV = KE(in joules) / elementary charge.

This probably all seems really confusing because tbf I really have no idea what I am on about but I'm so confused so if you are an expert in the field please do help Thankyou!!!!

I do OCR A and have my unit 2 exam in a week so its kinda help for that!!
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