(ii) An explanation linking electrons one of removed by friction (1) (transferred) to plastic (1) protons moving", seen anywhere in part (i) or (ii) loses this mark] ignore reference to charge before rubbing transferred from cloth (c)(ii) opposite to charge on plastic (1) equal to charge on the plastic (1) charge on cloth is positive same size as charge on plastic electrons transferred from the cloth equal to electrons lost by cloth (2) Total question = 8 marks Q2. Answer Acceptable answers Mark A description to include the situation which caused the charge separation (1) where the spark travelled from or to(1) examples when refuelling, spark between end of fuel/pipe and vehicle =2 spark between/from /to person comb/clothes/metal handle and, when combing hair/removing clothing/opening door = 2 lightning flash, between cloud and cloud/plane/ground, =2 ignore between plug and socket/jump leads (2) Q3. Indicative Content Mark An explanation etc. including some of the following points static electricity opposites charges attract charges are (6)
terminology accurately spelling, punctuation and grammar are used with few errors Q4. Answer Acceptable answers Mark (a) an explanation linking: balloons repel (1) (because) they have like charges (1) balloons repulse / push away (from each other/to the side) same charge / both positive / both negative accept like charges repel for 2 marks (2) (b)(i) D an equal positive charge (1) (b)(ii) an explanation linking any two of friction (between cloth and balloon) (1) transfer of electrons (1) (electrons/negative charges move) from cloth to balloon (1) charge/electrons move accept balloon gains electrons from the cloth for 2 marks (2) (b)(iii) a description including two from the following: balloon becomes discharged (1) metal /cabinet is a conductor (1) electrons move through / on to metal / cabinet (1) earthed / neutral (negative) charge for electrons accept electrons move to earth for 2 marks (2) (b)(iv) (surface of) wall (becomes) positively charged /charged by induction (1) charges on the wall separate charge closest to the surface of the wall is opposite to the charge on the balloon (1) Q5. Answer Acceptable answers Mark (i) Correct responses can be seen in (i) or (ii) An explanation linking electrons ["positive electrons/ protons moving", seen anywhere in part (i) or (ii) loses this mark] ignore reference to charge (2)
one of removed by friction (1) (transferred) to plastic (1) before rubbing transferred from cloth (ii) opposite to charge on plastic (1) equal to charge on the plastic (1) charge on cloth is positive same size as charge on plastic electrons transferred from the cloth equal to electrons lost by cloth (2) Q6. Answer Acceptable answers Mark (i) B electrons (1) (ii) An explanation linking (negative) electrons transfer (1) because of friction/from cloth (to base) (1) negative charge (reject protons and positive charge for this mp) moves cloth loses electrons/negative charge (to base) = 2 (2) (iii) A suggestion to include charge (any) could move through cup /metal (1) (cup is) earthed (1) cup/metal is a conductor ignore metal is not an insulator to earth/ ground / to/ through student's hand (2) (iv) (1) Q7. Answer Acceptable answers Mark (i) D an equal positive charge (1) (ii) an explanation linking any two of friction (between cloth and balloon) (1) transfer of electrons (1) (electrons/negative charges move) from cloth to balloon (1) charge/electrons move accept balloon gains electrons from the cloth for 2 marks (2) (iii) a description including two from the following: balloon becomes earthed / neutral (negative) charge for electrons accept electrons move to (2)
Q9. Answer Acceptable answers Mark (a)(i) B electrons (1) (a)(ii) An explanation linking (negative) electrons transfer (1) because of friction/from cloth (to base) (1) negative charge (reject protons and positive charge for this mp) moves cloth loses electrons/negative charge (to base) = 2 (2) (a)(iii) A suggestion to include charge (any) could move through cup /metal (1) (cup is) earthed (1) cup/metal is a conductor ignore metal is not an insulator to earth/ ground / to/ through student's hand (2) (a)(iv) (1) (b) A description to include the situation which caused the charge separation (1) where the spark travelled from or to(1) examples when refuelling, spark between end of fuel/pipe and vehicle =2 spark between/from /to person comb/clothes/metal handle and, when combing hair/removing clothing/opening door = 2 lightning flash, between cloud and cloud/plane/ground, =2 ignore between plug and socket/jump leads (2)