1. Draw appropriate charges on each material and show the transfer of charges after rubbing. Balloon Balloon Cloth Cloth Balloon and cloth before rubbing Balloon and cloth after rubbing 2. What happens if the balloon in stage 2 of Question 1 is in contact with a metal strip? Explain. Metal Balloon 3. Why a PC monitor is covered with dust? 4. After gaining electrons from the cloth, can the polythene rod attract small pieces of paper? Explain. Polythene rod Cloth6. Figure shows two polythene rods under two different situations. Write which pair attracts and which pair repels. Write the property you used for each case. + + Property.. .. .... + + + + + + + + + + + + + + (a) (b) 7. When you walk across a nylon carpet, you become negatively charged. When you touch a metal handle you receive a shock. Explain why this happens. . . . . 8. Figure shows objects with charges. Show from which object the electrons flows. State why. In which of these figures do you get a static electric spark? Draw the spark on the figure. + + + + + + + + + + i (a) ii i (b) ii i (c) ii i (d) ii9. Compare and contrast charging by rubbing and charging by induction using a Venn diagram