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IB Physics HL D 2 18 Hl Equipotentials and Electric Fields Questions

Practise IB Physics HL D.2.18 with questions modelling electric fields, potential and force from equations, diagrams and data.

Syllabus
First assessment 2025
Course
Physics HL
Level
HL

Exam points

  • Use equipotential maps to determine the direction of electric force, acceleration and initial velocity for positive or negative charges.
  • Model charged-particle motion in electric fields using potential energy, work, field direction and conservation of energy.
  • Use capacitor and equipotential geometry relationships, including perpendicular motion to equipotential surfaces, to interpret a field model.

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Study D.2.18 (HL)—Equipotentials and electric fields conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Physics HL D 2 18 Hl Equipotentials and Electric Fields Questions question 1

[Maximum number: 1]

A metal sphere is charged positively and placed far away from other charged objects. The electric potential at a point on the surface of the sphere is 53.9 kV .

A small positively charged object moves towards the centre of the metal sphere. When the object is 2.8 m from the centre of the sphere, its speed is 3.1 ms−13.1 \mathrm{~ms}^{-1}. The mass of the object is 0.14 g and its charge is 2.4×10−8C2.4 \times 10^{-8} \mathrm{C}.

Comment on the angle at which the object meets equipotential surfaces around the sphere.

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