Hi!
I was just wondering what exactly is the unit eV and why it's being used in many of the problems we see (instead of the SI unit J). How is it related to J and do we have to convert it to J every time we have to calculate something energy-related?
Defining eV
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Bella Bursulaya 3G
- Posts: 133
- Joined: Wed Sep 30, 2020 9:54 pm
Re: Defining eV
Hi! So Professor Lavelle mentioned that the eV is the amount of kinetic energy that an electron gains from moving across an electric potential difference of 1 volt.
The conversion is 1.602 x 10^-19 J. I am unsure if we need to memorize this, however, if you work with it enough, you'll end up memorizing it haha!
The conversion is 1.602 x 10^-19 J. I am unsure if we need to memorize this, however, if you work with it enough, you'll end up memorizing it haha!
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Bella Bursulaya 3G
- Posts: 133
- Joined: Wed Sep 30, 2020 9:54 pm
Re: Defining eV
Sorry I forgot to answer the second part of your question. We do need to convert from eV to J I am pretty sure, to make sure all of our units cancel out!
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Kelly Yun 2I
- Posts: 103
- Joined: Wed Sep 30, 2020 10:03 pm
Re: Defining eV
Would there be an equation for this topic that would not be on the formula sheet but one that we would have to know?
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