A-LevelPhysicsElectricityMay/June 2017Paper 1 Q41 Mark
The current in a block of semiconductor is 30.0 mA when there is a potential difference (p.d.) of 10.0 V across it. The dimensions of the block and the direction of the current in it are as shown. [Diagram shows a block with dimensions 15.0 mm (width), 15.0 mm (height), and 30.0 mm (length). A current of 30.0 mA flows along the 30.0 mm length.] The electrical meters used are accurate to ± 0.1 mA and ± 0.1 V. The dimensions of the block are accurate to ± 0.2 mm. What is the resistivity of the semiconductor?
A10.0 ± 0.2 Ωm
B10.0 ± 0.3 Ωm
C10.0 ± 0.5 Ωm
D10.0 ± 0.8 Ωm
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The correct answer is C. This question tests the candidate's understanding of electricity within the Physicssyllabus. The examiner's mark scheme requires...
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