I was just thinking, does anyone have an answer booklet to have a look how its set out? Ive just realised i have no idea if im ticking boxes, filling in circles etc.
Feel quite prepared for this exam! ...unlike Economics.
Just need to get Electric Potential into my head - what it is and means exactly... it's kind of confusing when there's so many types of potential all denoted V!
Feel quite prepared for this exam! ...unlike Economics.
Just need to get Electric Potential into my head - what it is and means exactly... it's kind of confusing when there's so many types of potential all denoted V!
When I was learning the definition about this I got slightly confused; it is, as you know, "The work done in bringing a unit positive charge from infinity to a certain point in an electric field". Is it positive because the convention for an electric field is +ve -> -ve so that work must be done against the direction of the field?
It's a pretty minor query I have here but I don't understand why the definition insists the unit charge is positive
http://www.egsphysics.co.uk/ go to the exams section and scroll down to a-levels. Our teacher told us the multiple choice questions get continuously recycled through the years and this is very true. Some people in last year who did the past spec papers, on real exam multiple choice, they hads seen nearly half the questions before, so they already had half the marks without any work. That's probably my best tip
Firstly thanks for the tip.
Secondly does anyone know where I can get June 2011 and answers?
When I was learning the definition about this I got slightly confused; it is, as you know, "The work done in bringing a unit positive charge from infinity to a certain point in an electric field". Is it positive because the convention for an electric field is +ve -> -ve so that work must be done against the direction of the field?
It's a pretty minor query I have here but I don't understand why the definition insists the unit charge is positive
If I understand what you're saying, yes, I think so. Little explanation in case you're saying something different:
OK, so we have our unit positive charge, and it's being moved into the electric field - being generated by a positive charge (by default).
It's obviously going to be difficult to move a positive charge closer to another positive charge. This is why there's work done in bringing it closer.
A negative charge moving into a "negative field" would have the same work done when you calculate it - the two minus signs cancel - but electric potential is defined around a positive test charge just... yeah, because it needs a definition.
Yeah, I'm pretty sure it's 90 UMS average over 4, 5 & 6
This is correct.
Loads of teachers and schools are utterly misinformed. The conditions for A* are a 90% average across all A2 units, and 80% over the whole A-level. The only exception is Maths, where the module choice is so wide that the definition of "A2 unit" has to change slightly to keep it fair.
Loads of teachers and schools are utterly misinformed. The conditions for A* are a 90% average across all A2 units, and 80% over the whole A-level. The only exception is Maths, where the module choice is so wide that the definition of "A2 unit" has to change slightly to keep it fair.