IB Physics SL D.3.4 Magnetic force on charge Question Bank

Practise IB Physics SL/HL D.3.4 by applying magnetic force on charge concepts to exam-style physics questions.

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

[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 D.3.4—Magnetic force on charge question 1 — IB Physics SL

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

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.

$F=<q v B=1.6 \times 10^{-19} \times 2.0 \times 10^{-4} \times 0.25=>8.1 \times 10^{-24} \mathrm{~N}$

directed down OR south

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D.3.4—Magnetic force on charge question 1