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IB Physics HL D 2 15 Hl Electric Potential Gradient Questions

Practise IB Physics HL D.2.15 Electric fields and equipotentials with questions connecting electric fields, potential difference and work.

Syllabus
First assessment 2025
Course
Physics HL
Level
HL

Exam points

  • Use E=-ΔV/Δr to relate electric-field strength to the potential gradient, including sign and direction.
  • Determine potential differences from a uniform electric field and displacement.
  • Interpret areas under E–r graphs as potential differences or work per unit charge.

IB Physics HL D 2 15 Hl Electric Potential Gradient Questions question 1

[Maximum number: 1]

This question is about electric potential and electric field.

A metal sphere of radius 0.080 m is charged to a potential of 300 V .

State the value of the magnitude of the gradient of electric potential at a distance of 0.16 m from the centre of the sphere.

A6. This question is about the motion of a copper rod in a magnetic field.

A copper rod XY is able to move freely along two horizontal, parallel conducting rails A and B . The conducting rails are in a region of uniform magnetic field that is in a direction perpendicular to the plane of the rails. The rails are connected together at one end by a conducting wire.

Figure for Question IB Physics HL D 2 15 Hl Electric Potential Gradient Questions question 1 — IB Physics HL

In the situation shown, the rod is moved along the rails at a constant speed v by a constant horizontal force of magnitude F.

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