IB Physics SL D 3 4 Magnetic Force on Charge Questions

Calculate magnetic force on charged particles and conductors, determine its direction, and analyse charge motion, current-carrying wires and magnetic deflection.

Syllabus
First assessment 2025
Course
Physics SL
Level
SL

Exam points

  • Determine the magnitude and direction of magnetic force on moving charged particles.
  • Apply F=qvB sinθ and right-hand rules to calculate force and its direction.
  • Explain magnetic forces in different reference frames and for charged fluids or conductors.

IB Physics SL D 3 4 Magnetic Force on Charge Questions question 1

[Maximum number: 2]

In an experiment a student constructs the circuit shown in the diagram. The ammeter and the voltmeter are assumed to be ideal.

Figure for Question IB Physics SL D 3 4 Magnetic Force on Charge Questions question 1 — IB Physics SL

The diagram shows a cross-sectional view of the connecting wire in (c).

Figure for Question IB Physics SL D 3 4 Magnetic Force on Charge Questions question 1 — IB Physics SL

The wire which carries a current of 3.5 A into the page, is placed in a region of uniform magnetic field of flux density 0.25 T . The field is directed at right angles to the wire.

Determine the magnitude and direction of the magnetic force on one of the charge carriers in the wire.

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