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IB Physics SL B 5 1 Cells Provide a Source of Emf Questions

Practise IB Physics SL B.5.1 by defining a cell’s emf and calculating energy supplied per unit charge.

Syllabus
First assessment 2025
Course
Physics SL
Level
SL

Exam points

  • Define emf as work or energy supplied per unit charge around a complete circuit.
  • Calculate emf from charge energy or cell readings, keeping volts as joules per coulomb.

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Study B.5.1—Cells provide a source of emf conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Physics SL B 5 1 Cells Provide a Source of Emf Questions question 1

[Maximum number: 1]

This question is in two parts. Part 1 is about a thermistor circuit. Part 2 is about vibrations and waves.
Part 1 Thermistor circuit
The circuit shows a negative temperature coefficient (NTC) thermistor X and a 100kΩ100 \mathrm{k} \Omega fixed resistor R connected across a battery.

Figure for Question IB Physics SL B 5 1 Cells Provide a Source of Emf Questions question 1 — IB Physics SL

The battery has an electromotive force (emf) of 12.0 V and negligible internal resistance.

Define electromotive force (emf).

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