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IB Physics SL B.5.4 Ohmic behaviour Question Bank

Practise IB Physics SL B.5.4 by stating Ohm’s law and deciding whether components are ohmic from current–voltage graphs.

Syllabus
First assessment 2025
Course
Physics SL
Level
SL

Exam points

  • State Ohm’s law with constant temperature and identify a constant-resistance V–I relationship.
  • Use graph shape and V/I values to distinguish ohmic and non-ohmic components.

B.5.4—Ohmic behaviour question 1

[Maximum number: 2]

Part 2 Electric current and resistance
The graph below shows how the current I in a tungsten filament lamp varies with potential difference V across the lamp.

Figure for Question B.5.4—Ohmic behaviour question 1 — IB Physics SL

Explain whether or not the filament obeys Ohm's law.

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