Physics (AS & A Level) · Feb / March 2017 · Paper 22 · Question 5

An electron is travelling in a straight line through a vacuum with a constant speed of 1.5 × 107 m s–1. The electron enters a uniform electric field at point A, as shown in Fig. 5.1. electron speed 1.5 × 107 m s–1 2.0 cm uniform electric field B A Fig. 5.1 The electron continues to move in the same direction until it is brought to rest by the electric field at point B. Distance AB is 2.0 cm.

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