Unit B624/02 - OCR

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SECTION C – MODULE P4 9 This question is about static electricity. (a) Static electricity can be dangerous when refuelling an aircraft. Suggest why. __________________________________________ ________________________________________ [1] (b) A plastic ruler is rubbed with a cloth. The ruler becomes POSITIVELY charged. Explain how the ruler becomes positively charged. __________________________________________ __________________________________________ ________________________________________ [2] 26
(c) Static electricity can also be useful. It is used in hospitals. A doctor can RESTART a patient’s HEART. He puts the paddles on the patient’s chest. The paddles are charged. Describe what happens next. In your answer write about • how the heart restarts • the precautions taken. __________________________________________ __________________________________________ __________________________________________ ________________________________________ [2] [Total: 5] 27
Page 1 and 2: Candidate Forename Centre Number Ca
Page 3 and 4: EQUATIONS speed = distance time tak
Page 5 and 6: Answer ALL the questions. SECTION A
Page 7 and 8: (c) The scientist says that the pla
Page 9 and 10: (b) Tomato plants are often grown i
Page 11 and 12: 3 Plants need minerals to grow. The
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Page 17 and 18: (b) The overuse of fertilisers some
Page 19 and 20: (c) Another way of cleaning clothes
Page 21 and 22: lakes and reservoirs sedimentation
Page 23 and 24: 8 This question is about acids and
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Page 29 and 30: 11 ULTRASOUND scans are used in hos
Page 31 and 32: (ii) An X-ray gun is rotated around
Page 33 and 34: (c) Background radiation is always
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Unit B624/02 - OCR

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