Looking to do some prep for your QCE Unit 3 Physics Data Test? We’ve got plenty of practice questions to help you study.
In order to feel confident for the actual test, it’s good to get some exposure to what the questions will look like — and our practice questions do just that!
Once you’ve answered all the questions, you’ll also be able to download a copy of the solutions to see how you went.
So, let’s dive into the questions!
Data Set 1
A boy spun his rubber eraser on a string in a circle above his head at various velocities, measurements of the rubbers centripetal acceleration were taken at these various velocities and measured as follows:
Table 1: Results from centripetal acceleration experiment
Graph 1: Figure showing relationship between tangential velocity and centripetal acceleration of an eraser undergoing uniform circular motion.
Question 1 (2 marks)
Calculate the average centripetal acceleration for the tangential velocity of 6ms-1 to two decimal places.
Question 2 (2 marks)
Calculate the centripetal acceleration measured during the second trial for the tangential velocity of 10ms-1.
Question 3 (2 marks)
Making reference to Table 1, deduce the relationship between the eraser’s tangential velocity v and its centripetal acceleration ac.
Question 4 (4 marks)
Using the average centripetal accelerations from Table 1, determine the length of the string that is tied to the eraser, including the uncertainty in this length.
Data Set 2
The electric field strength produced by a positive charge located at the origin was measured by placing a negative charge within said field at various distances r to the right of the origin, the results were as follows:
Table 2: Results from Electric Field Strength experiment
Question 1 (2 marks)
Determine the nature of the relationship between the Electric Field Strength produced by the positive charge and the radius of the negative charge from said field. Refer to Table 2.
Question 2 (2 marks)
Using the relationship determined in Question 1, predict what the radius r will be for the final row of Table 2.
Question 3 (3 marks)
Calculate the magnitude of the negative charge, including the relative uncertainty in the final answer.
Question 4 (2 marks)
The actual magnitude for the negative charge is 3 ∗ 10-11C (note that this is a magnitude hence why it is positive). With this in mind, what percentage error is present within the experiment?
Question 5 (3 marks)
What is the magnitude of the positive charge? (No uncertainty calculations needed)
Question 6 (2 marks)
While at a distance of 6cm from the positive charge, the negative charge experiences an acceleration of 2.4 ∗ 1010ms-2. What is the mass of the negative charge?
Data Set 3
A 5cm long current carrying wire was suspended in a magnetic field, the angle of this wire was then varied and the force acting on the wire was measured as follows:
Table 3: Results from current carrying wire experiment
Graph 2: Relationship between the angle between a current carrying wire in a magnetic field and the force experienced by said wire
Question 1 (4 marks)
Identify any trends in the results making reference to Table 3 and Graph 2 and furthermore, determine a relationship between the angle of the current carrying wire to the magnetic field (θ) and the Force experienced by said wire (F).
Question 2 (3 marks)
A charge of 35 Coulombs takes 5 seconds to travel through the wire. From this, determine both the current travelling through the wire and the magnetic field strength that the wire is suspended in.
QCE Unit 3 Physics Data Test Practice Solutions
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William Bye is a Content Writer at Art of Smart and is currently studying a Bachelor of Advanced Science with Honours (majoring in Physics) at the University of Queensland. He was part of the very first cohort in Queensland to go through the ATAR system and wishes to help other students to make this journey as easy as possible. Will enjoys his time playing guitar in a band with his friends and hopes to continue balancing his science and music for many years to come.