Physics (AS & A Level) · May / June 2020 · Paper 23 · Question 7
9702
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A potential difference is applied between two horizontal metal plates that are a distance of 6.0 mm apart in a vacuum, as shown in Fig. 7.1. path of β– particle radioactive source horizontal plate horizontal plate 6.0 mm – 450 V 0 V Fig. 7.1 The top plate has a potential of –450 V and the bottom plate is earthed. Assume that there is a uniform electric field produced between the plates. A radioactive source emits a β– particle that travels through a hole in the bottom plate and along a vertical path until it reaches the top plate.
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7(a)(i)[4]
7(a)(ii)[2]
7(b)[2]
7(c)(i)[2]
7(c)(ii)[2]
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