Fig. 5.1 shows a method of producing sandpaper using static electricity. [Figure 5.1] Glue is sprayed on to moving paper. The sticky paper then passes between two metal plates. One of the plates is positive and the other plate is negative. There is an electric field between the plates.

1. (a)On Fig. 5.2, draw the electric field between the two metal plates. Show the direction of the electric field. [Figure 5.2][2]
2. (b)(i)Explain, using ideas about the movement of charge, why the top layer of sand becomes positively charged.[1]
3. (b)(ii)State why the top layer of sand moves towards the sticky paper.[1]
4. (c)A student receives an electric shock by walking across a certain type of carpet and then nearly touching a piece of earthed metal with his hand. The potential difference between the hand and the metal is 2000V and the charge transferred is 4.0 × 10⁻⁴ C. Calculate the energy transferred when the spark jumps across the air gap from the metal onto his hand. energy =[2]

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