Edexcel A level physics core Practical's
June 2024 Exam Questions and Answers
100% Pass
Core practical 1 determining g methodology - Answer>>Drop
object from rest.
Measure time taken for sphere to fall to trap door OR measure
time taken for card to fall through light gate.
Core practical 1 safety - Answer>>Clamp stands etc. and make
sure that all apparatus cannot topple over.
Be aware of falling objects.
Core practical 1 methods to reduce error. - Answer>>Make sure
card is falling straight - reduces air resistance and same length
has to fall through light gate each time - introduces uncertainty in
the length.
Use large values of h to reduce effects of uncertainty of t.
Core practical 1 measurements and analysis - Answer>>Time
taken for object to fall x distance - repeat 3 times at each height
and then at 5 different heights.
Plot a graph of t^2 against h and work out gradient.
g = 2/m
OR
Time taken for object to fall through light gate - work out final
velocity v.
Plot a graph of v^2 against h and calculate gradient.
g=m/2
Core practical 1 uncertainty - Answer>>Use half of range of t
readings, calculate percentage uncertainty for t.
, Core practical 2 determining resistivity of a metal methodology -
Answer>>Measure diameter of wire - 3 positions around wire
and at 3 orientations at each point - mean.
Circuit of a power supply, variable resistor, ammeter and length of
wire all in series and then a voltmeter over the eighth of wire.
Connect crocodile clip at 0, then at 10cm intervals from the end of
the wire.
Record resistance at each length.
Voltmeter and ammeter = greater resolution than multimeter.
Core practical 2 - safety - Answer>>Low voltages and currents
used - no hazard.
Normal laboratory safety to do with electricity.
Core practical 2 reducing errors. - Answer>>Crocodile clip not
at 0 - systematic error.
Crocodile clip not properly attached = higher resistance measured
- check before carrying experiment out.
Ohm-meter can replace power supply, voltmeter and ammeter.
Heating of wire - ohmmeter reduces this error.
Ensure that wire is straight - deformation changes cross- sectional
area and length of wire.
Line of best fit - weighted average, reduces impact of random
errors and can show systematic errors.
Core practical 2 measurements and analysis. -
Answer>>Measure voltage and current at each length and
calculate resistance (R=V/I).
Measure length of wire - use ruler.
Plot a graph of R against L - R=pl/A - resistivity = gradient x A
Core practical 2 uncertainty. - Answer>>Uncertainty of radius
doubled as πr^2.
June 2024 Exam Questions and Answers
100% Pass
Core practical 1 determining g methodology - Answer>>Drop
object from rest.
Measure time taken for sphere to fall to trap door OR measure
time taken for card to fall through light gate.
Core practical 1 safety - Answer>>Clamp stands etc. and make
sure that all apparatus cannot topple over.
Be aware of falling objects.
Core practical 1 methods to reduce error. - Answer>>Make sure
card is falling straight - reduces air resistance and same length
has to fall through light gate each time - introduces uncertainty in
the length.
Use large values of h to reduce effects of uncertainty of t.
Core practical 1 measurements and analysis - Answer>>Time
taken for object to fall x distance - repeat 3 times at each height
and then at 5 different heights.
Plot a graph of t^2 against h and work out gradient.
g = 2/m
OR
Time taken for object to fall through light gate - work out final
velocity v.
Plot a graph of v^2 against h and calculate gradient.
g=m/2
Core practical 1 uncertainty - Answer>>Use half of range of t
readings, calculate percentage uncertainty for t.
, Core practical 2 determining resistivity of a metal methodology -
Answer>>Measure diameter of wire - 3 positions around wire
and at 3 orientations at each point - mean.
Circuit of a power supply, variable resistor, ammeter and length of
wire all in series and then a voltmeter over the eighth of wire.
Connect crocodile clip at 0, then at 10cm intervals from the end of
the wire.
Record resistance at each length.
Voltmeter and ammeter = greater resolution than multimeter.
Core practical 2 - safety - Answer>>Low voltages and currents
used - no hazard.
Normal laboratory safety to do with electricity.
Core practical 2 reducing errors. - Answer>>Crocodile clip not
at 0 - systematic error.
Crocodile clip not properly attached = higher resistance measured
- check before carrying experiment out.
Ohm-meter can replace power supply, voltmeter and ammeter.
Heating of wire - ohmmeter reduces this error.
Ensure that wire is straight - deformation changes cross- sectional
area and length of wire.
Line of best fit - weighted average, reduces impact of random
errors and can show systematic errors.
Core practical 2 measurements and analysis. -
Answer>>Measure voltage and current at each length and
calculate resistance (R=V/I).
Measure length of wire - use ruler.
Plot a graph of R against L - R=pl/A - resistivity = gradient x A
Core practical 2 uncertainty. - Answer>>Uncertainty of radius
doubled as πr^2.
