The drag force on a car is F = ½ρCAv², where C has no units. Show that the equation is homogeneous.
From Paper 2: Advanced Physics II
11(b)*6 marks
Describe how to determine the viscosity of a liquid using a falling-ball method. Include how you would ensure the ball has reached terminal velocity.
From Paper 3: General and Practical Principles in Physics
1(a)3 marks
Describe how to measure g using an electromagnet, a steel ball and a light gate or trapdoor timer.
From Paper 3: General and Practical Principles in Physics
1(b)4 marks
Figure 1 shows h against t². Use it to determine g.
Figure 1
From Paper 3: General and Practical Principles in Physics
1(c)3 marks
Explain why electronic timing is better than a stopwatch here, and why the largest heights give the most reliable results.
From Paper 3: General and Practical Principles in Physics
2(a)3 marks
Describe how to investigate how the pressure of a fixed mass of gas at constant volume varies with temperature.
From Paper 3: General and Practical Principles in Physics
2(b)4 marks
Figure 2 shows the results. Use the data to estimate absolute zero.
Figure 2
From Paper 3: General and Practical Principles in Physics
2(c)2 marks
Explain why the tubing connecting the flask to the pressure gauge should be as short as possible.
From Paper 3: General and Practical Principles in Physics
3(a)4 marks
Describe how a top-pan balance can be used to determine the magnetic flux density between two magnets.
From Paper 3: General and Practical Principles in Physics
3(b)4 marks
The gradient of a graph of balance reading (g) against current (A) is 2.45 g A⁻¹. The length of wire in the field is 0.050 m. Calculate B and explain why the balance reading can increase.
From Paper 3: General and Practical Principles in Physics
4(a)4 marks
Describe how to investigate how the period of a mass–spring system depends on the mass.
From Paper 3: General and Practical Principles in Physics
4(b)4 marks
The gradient of T² against m is 0.158 s² kg⁻¹. Calculate the spring constant and explain why the line does not pass through the origin.
From Paper 3: General and Practical Principles in Physics
11(a)4 marks
Describe how to measure the speed of sound in air using a signal generator, loudspeaker, two microphones and an oscilloscope.
From Paper 3: General and Practical Principles in Physics
11(c)3 marks
The distance was measured to ±0.005 m. Calculate the percentage uncertainty in v from this and explain why measuring over five wavelengths is better than one.
From Paper 3: General and Practical Principles in Physics
12(a)3 marks
Describe how to determine the wavelength of laser light using a diffraction grating.
From Paper 3: General and Practical Principles in Physics
12(c)3 marks
Give one safety precaution and explain why using higher orders improves accuracy.
Score 0 / 57 · 0 of 17 marked
This paper is written by Plasmo in the style of the Edexcel A-Level Physics exam. It is not a past paper and is not produced or endorsed by the exam board.
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