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IB Physics HL D.2.18 Electric Field Modelling Question Bank

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

  • identify the relevant physical quantity, model or diagram
  • apply the correct equation and units to the evidence
  • justify the result using conservation laws, fields or energy relationships

D.2.18 (HL)—Equipotentials and electric fields 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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