Physics (AS & A Level) · Oct / Nov 2018 · Paper 53 · Question 2
9702
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A student is investigating the electric potential near a charged metal sphere. The sphere is suspended from the ceiling as shown in Fig. 2.1. position of flame probe charged sphere insulated thread L ceiling Fig. 2.1 A flame probe is used to measure the potential V at a distance L from the surface of the sphere. The experiment is repeated for different distances from the sphere. It is suggested that V and L are related by the equation V = Q 4πε0(L + a) where Q is the charge on the sphere, a is the radius of the sphere and ε0 is the permittivity of free space. 1
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2(a)[1]
2(b)[2]
2(c)(i)[2]
2(c)(ii)[2]
2(c)(iii)[2]
2(c)(iv)[2]
2(d)(i)[3]
2(d)(ii)[1]
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