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Could someone please explain the whole concept of back EMF. I know it rises as a result of Lenz's law and the law of conservation of energy, but I'm now sure how to explain it in detail. Also, I know that back EMF opposes supply, but what are the states and why does back EMF initially...

School rank- Varies between 15-25 usually English Advanced- 60/140 Maths Extension 1- 50/110 Maths Extension 2-30/55 Physics -20/65 Chemistry-25/105 So, as the title suggests, could I please get an ATAR estimate? (BTW ranks probably seem a bit too even, i know, but these are very...