A-LevelPhysicsElectric fieldsOct/Nov 2017Paper 2 Q510 Marks
(a) Define electric field strength. (b) Two parallel metal plates in a vacuum are separated by 0.045m. A potential difference V is applied between the plates, as shown in Fig. 5.1. [Figure 5.1] A proton is initially at rest on the surface of the positive plate. The proton in the uniform electric field takes a time of 1.5 × 10⁻⁷ s to reach the negative plate. (c) An α particle is now accelerated between the two metal plates in (b) by the electric field. Calculate the ratio acceleration of α particle / acceleration of proton
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