Edexcel A level Physics Paper 3 June
2024 Exam Questions and Answers
100% Pass
Describe the method to determine the acceleration of a freely
falling object, using an electromagnet -
Answer>>1. Open switch to
break connections between battery and electromagnet in the
primary circuit and turn on the timer in the secondary circuit
2. Electromagnet demagnetises causing steel ball to fall a
distance, h, from the bottom of the ball to the top of the trap door,
measure h with a ruler
3. When the ball falls through the trap door it stops the timer
4. Record the time taken to fall h, repeat process three times,
discard anomalies and find average time
5. Vary h and record corresponding t
How do analyse the results from the acceleration of a freely falling
object, using an electromagnet - Answer>>s= h
u=0
a=g
t=t
using s=ut+0.5at^2
, t^2 = 2/g * h
plot t^2 against h and draw a line of best fit
g = 2/m
What saftey precautions should you use in determing the
acceleration of a freely falling object, using an electromagnet -
Answer>>If dropping of a table, clamp electromagnet stand to
table to prevent it toppling over
be aware of falling ball, use a tray to capture ball at bottom
small currents used in circuit, no danger of electric shock
What are the possible errors in the method to determine the
acceleration of a freely falling object, using an electromagnet -
Answer>>small t values, use a larger distance to reduce
uncertainty
time delay between the timer starting and ball being released due
to residual magnetism in ball, use a lower current so that the
electromagnet has a weaker magnetic feild
Air resistance, use a smaller heavier ball so travels faster.
Describe the method to determine the electrical resistivity of a
material - Answer>>1. At various points along the wire measure
the diameter, d, repeat at 90 degree angles at the same point get
about 6 readings and find average, and calculate the cross-
sectional area, A,
2. Connect circuit shown above
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