A-LevelPhysicsElectric fieldsOct/Nov 2020Paper 1 Q311 Mark
A molecule behaves as an electric 'dipole' consisting of two equal point charges of opposite sign, separated by a fixed distance. The molecule moves with constant horizontal velocity as it enters a vertical uniform electric field, as shown. [Figure 31.1] The positive and negative charges of the molecule enter the field at the same time. What describes the effect of the electric field on the velocity of the molecule?
Ahorizontal component of velocity: constant, vertical component of velocity: increases
Bhorizontal component of velocity: constant, vertical component of velocity: zero
Chorizontal component of velocity: increases, vertical component of velocity: increases
Dhorizontal component of velocity: increases, vertical component of velocity: zero
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The correct answer is B. This question tests the candidate's understanding of electric fields within the Physicssyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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