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CAIE A-Level Physics AS 9.3.6 R L a Questions

Use R = ρL / A to calculate resistance, resistivity, length and cross-sectional area.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • Use R = ρL / A to calculate resistance, resistivity, length and cross-sectional area.

CAIE A-Level Physics AS 9.3.6 R L a Questions question 1

[Maximum number: 1]

The resistance of a metal cube is measured by placing it between two parallel plates, as shown.

Figure for Question CAIE A-Level Physics AS 9.3.6 R L a Questions question 1 — CAIE A-Level Physics AS

The cube has volume V and is made of a material with resistivity ρ\rho. The connections to the cube have negligible resistance.

Which expression gives the electrical resistance of the metal cube between X and Y ?

A

ρV13\rho V^{\frac{1}{3}}

B

ρV23\rho V^{\frac{2}{3}}

C

ρv13\frac{\rho}{v^{\frac{1}{3}}}

D

ρv23\frac{\rho}{v^{\frac{2}{3}}}

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