Ohm From Ohm

e=mc2andallthat

Amongst the myriad inconveniences and troubles of a Physics teacher’s life, the choice of the symbols commonly used to represent voltage, current and resistance, must surely rank in the top ten.

V is for voltage in volts, V

Well, OK, that’s sensible enough. On a good day, I may even remember to call it “potential difference”. The sage advice of “Never use two words when one will do” is widely accepted. However, as a profession Physics teachers have decided to go it alone and completely ignore it. One can only hope that everyone got the memo.

R is for resistance in ohms, Ω

R for resistance? That’s fairly sensible too.

“But what’s that weird squiggly thing, Sir?”

“Ah, you mean the Greek letter omega? Because Physics is soooo enormous that the measly 26 letters of the Latin alphabet ain’t big enough for it…”

I is for current in amps…

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About e=mc2andallthat

Physics teacher of over 20 years experience who still enjoys teaching (well, most of the time anyway). He lives in London with his lovely wife and insane cat. Please follow him on Twitter @emc2andallthat
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