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    Would I need to know about cathode ray tubes for AS physics, and how would I know whether what I would need to know and what I wouldn't?
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    (Original post by tammie123)
    Would I need to know about cathode ray tubes for AS physics, and would I need to memorize this 'the cathode may produce 5 x 10^14 electrons per second'. Also how would I know whether what I would need to know and what I wouldn't? As my physics text book has a lot of excess information.
    Which board do you study?
    The specification of your board will contain everything you need to know.
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    Same question
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    (Original post by joostan)
    Which board do you study?
    The specification of your board will contain everything you need to know.
    OCR
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    (Original post by tammie123)
    OCR
    Option A or B?
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    (Original post by tammie123)
    OCR
    Option A:
    No you don't.
    http://www.ocr.org.uk/Images/81024-specification.pdf

    Option B:
    No you don't.
    http://www.ocr.org.uk/Images/74952-specification.pdf
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    (Original post by joostan)
    Option A or B?
    option A and thanks for the links
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    (Original post by tammie123)
    option A and thanks for the links
    np
 
 
 
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