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Start quizGCSE to AS Transition
A practical guide to the jump from GCSE to AS Physics, with summer prep and worked examples.
Read the guideMoving up from GCSE? Read the GCSE to AS Level Physics transition guide. Looking for revision routes? Start with OCR A Level Physics revision, A Level Physics MCQ practice, or A Level Physics problem solving practice.
Daily Question
Test your physics knowledge with a real daily question. Pick your level and give it a go!
A student estimates the acceleration a of a trolley down a shallow ramp from measurements of distance s and time t using a = 2s/t^2. They record s = 0.80 m with a metre rule (resolution 1 mm) and t ≈ 1.2 s with a hand-held stopwatch (about ±0.20 s per timing). They want to cut the percentage uncertainty in a to roughly half without changing the type of equipment. Which change should they make? Assume the true acceleration does not change.
In a lab, a clean metal photocathode with threshold frequency f0 is illuminated by monochromatic light of frequency 1.20 f0 and intensity I. The magnitude of the reverse potential needed to reduce the photocurrent to zero is measured as Vs1. The light frequency is then increased by 10% (to 1.32 f0) while the intensity is halved to I/2. Which statement must be true about the new stopping potential magnitude Vs2?
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