Curriculum
Course: IB Physics HL
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Curriculum

IB Physics HL

Theme A — Space, Time and Motion

0/125 Dr Dabour Hub Science Diagram and Course Material

Theme B — The Particulate Nature of Matter

0/105 Dr Dabour Hub Science Diagram and Course Material

Theme C — Wave Behaviour

0/73 Dr Dabour Hub Science Diagram and Course Material

Theme D — Fields

0/77 Dr Dabour Hub Science Diagram and Course Material

Theme E — Nuclear and Quantum Physics

0/89 Dr Dabour Hub Science Diagram and Course Material

Tools and Inquiry — IB Physics skills

0/43 Dr Dabour Hub Science Diagram and Course Material
Quiz

B.5.6 Electrical Resistivity – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
The unit of resistivity is
Ω m
Ω
Ω m−1
Ω m2
2.
A wire has resistance R. A wire of the same material with twice the length and twice the radius has resistance
R
2R
R/2
4R
3.
Copper wire 10 m long, area 2.0 × 10−6 m2, ρ = 1.7 × 10−8 Ω m. The resistance is
8.5 Ω
0.085 Ω
0.34 Ω
0.0085 Ω
4.
A graph of R (y) against L (x) for a uniform wire is a straight line through the origin. The gradient is
ρA
ρ/A
A/ρ
ρL
5.
A wire is stretched so that its length triples at constant volume. The resistance becomes
9 times
3 times
6 times
27 times
6.
Which wire has the highest resistance, if all are the same material?
L = 1 m, d = 1 mm
L = 1 m, d = 2 mm
L = 2 m, d = 2 mm
L = 2 m, d = 1 mm
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Part of Theme B — The Particulate Nature of Matter — see every lesson and quiz in this unit.
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