Describe how to determine the emf and internal resistance of a cell. Include a circuit description, how the data are analysed and how to make the results accurate.
From Paper 1
6(b)4 marks
A 12 V battery of negligible internal resistance is connected to a 4.0 Ω resistor in series with a parallel combination of 6.0 Ω and 12 Ω. Calculate the current in the 6.0 Ω resistor and the power in the 4.0 Ω resistor.
From Paper 1
241 mark
A wire of length 2.0 m and cross-sectional area 1.0 × 10⁻⁷ m² has resistance 20 Ω. What is its resistivity?
From Paper 1
251 mark
What is the combined resistance of 6.0 Ω and 3.0 Ω in parallel?
From Paper 1
261 mark
A battery of emf 12 V and internal resistance 0.50 Ω supplies 4.0 A. What is the terminal pd?
From Paper 1
271 mark
A 9.0 V supply is connected across 2.0 kΩ and 1.0 kΩ in series. What is the pd across the 1.0 kΩ resistor?
From Paper 3 (Section A + Option A: Astrophysics)
2(a)3 marks
Describe how to measure the resistance of different lengths of a wire to determine its resistivity, giving two precautions.
From Paper 3 (Section A + Option A: Astrophysics)
2(b)5 marks
The gradient of a graph of R against L is 12.5 Ω m⁻¹. The diameter of the wire is 0.32 mm ± 0.01 mm. Calculate the resistivity and the percentage uncertainty in the cross-sectional area.
Score 0 / 22 · 0 of 8 marked
This paper is written by Plasmo in the style of the AQA A-Level Physics exam. It is not a past paper and is not produced or endorsed by the exam board.