IB Physics HL D 3 1 Charge in Electric Fields Questions

Calculate electric force and acceleration in electric fields, then predict charged-particle direction, speed and trajectory between plates or around charges.

Exam points

calculate electric field, electric force and charged-particle acceleration using potential difference, separation, charge and mass
determine the direction and changing motion of electrons, protons and other charges in uniform or non-uniform electric fields
interpret charged-particle trajectories between plates or around point charges, including parabolic motion, field gradients, potential-energy change and crossed-field effects

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Study D.3.1—Charge in electric fields conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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This question is in two parts. Part 1 is about photoelectricity. Part 2 is about electrical and magnetic force fields.
Part 1 Photoelectricity

(b) The diagram shows a pair of horizontal metal plates. Electrons can be deflected vertically using an electric field between the plates.

Figure for Question IB Physics HL D 3 1 Charge in Electric Fields Questions question 1 — IB Physics HL

Label, on the diagram, the polarity of the metal plates which would cause an electron positioned between the plates to accelerate upwards.

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IB Physics HL D 3 1 Charge in Electric Fields Questions question 1