Fig. 5.1 shows part of a machine used to investigate electrostatic charging. Before the machine is switched on the metal dome and the ball are uncharged. When the machine is switched on, the metal dome becomes negatively charged. Explain how charging the dome causes the metal ball P to become positively charged.

1. (a)Fig. 5.1 shows part of a machine used to investigate electrostatic charging. Before the machine is switched on the metal dome and the ball are uncharged. When the machine is switched on, the metal dome becomes negatively charged. Explain how charging the dome causes the metal ball P to become positively charged.[2]
2. (b)A photocopier works using electrostatic charging. It contains a drum whose surface conducts charge where it is exposed to light. Fig. 5.2 shows a piece of paper, the drum and the heater of a photocopier. The photocopier produces a copy of an original page on a piece of paper. The sentences below describe the process of making the copy but the sentences are in the wrong order. A The drum is given a positive charge. B The positively charged parts of the drum attract a black powder. C Where light hits the drum, the positive charge leaks away. D An image of the original page is projected onto the drum. E The drum rolls against a piece of paper, transferring powder to the paper. F The paper is heated which makes the black powder stick to it. Arrange the sentences in the correct order. The first and last sentences are already in the correct boxes.[2]

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