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# CGP revision guides for a level watch

1. So i've basically been struggling a lot trying to find material that i can use to revise for the new 2015 exam syllabus in chemistry and physics. I was very sceptical about getting CGP books because although they were ok for GCSE I always thought they would be too condensed or wouldn't have enough detail in them but...

Compared to the generic OCR textbook for physics I think there dummy proof really in the sense that you always understand exactly whats happening.
I'll give an example.

This is the information both have in comparison on parallel cells in series (physics).

Textbook:
- Gives a question on series and parallel cells that says
'the same 2 cells connected in parallel produce the same emf as one cell, but have a much smaller internal resistance, so provide a greater current.'
It then asks you 2 different questions, 1 using a parallel circuit and one using a series circuit which admittedly is more questions than the GCP book asks.

CGP:
-Gives an equation (emf)total = emf1 + emf2 + emf3 etc...
-Then states, ;For identical cells in parralel the total emf for the combination of cells is the same size as the emf of each of the individual cells because the current will split equally between the identical cells. The charge only gains emf from the cells it travels through - so the overall emf in the circuit doesn't increase.
- It then provides a worked example for how to calculate the EMF in a standard question with cells in parallel.

I just wanted to ask what your experiences are with the new a level CGP books or textbooks and which one I should use because i'm one of those people who has to learn something by completely understanding how every bit of it works.
2. (Original post by profjb)
So i've basically been struggling a lot trying to find material that i can use to revise for the new 2015 exam syllabus in chemistry and physics. I was very sceptical about getting CGP books because although they were ok for GCSE I always thought they would be too condensed or wouldn't have enough detail in them but...

Compared to the generic OCR textbook for physics I think there dummy proof really in the sense that you always understand exactly whats happening.
I'll give an example.

This is the information both have in comparison on parallel cells in series (physics).

Textbook:
- Gives a question on series and parallel cells that says
'the same 2 cells connected in parallel produce the same emf as one cell, but have a much smaller internal resistance, so provide a greater current.'
It then asks you 2 different questions, 1 using a parallel circuit and one using a series circuit which admittedly is more questions than the GCP book asks.

CGP:
-Gives an equation (emf)total = emf1 + emf2 + emf3 etc...
-Then states, ;For identical cells in parralel the total emf for the combination of cells is the same size as the emf of each of the individual cells because the current will split equally between the identical cells. The charge only gains emf from the cells it travels through - so the overall emf in the circuit doesn't increase.
- It then provides a worked example for how to calculate the EMF in a standard question with cells in parallel.

I just wanted to ask what your experiences are with the new a level CGP books or textbooks and which one I should use because i'm one of those people who has to learn something by completely understanding how every bit of it works.
I haven't used one for a new syllabus, but if you combine one with the knowledge you already have from your class notes and understanding, they should be fine

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Updated: February 20, 2016
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