Edexcel IGCSE Physics 4 Graphs Questions
Practise Edexcel IGCSE Physics graph skills by plotting data, choosing scales, drawing best-fit curves and interpreting graph relationships.
- Syllabus
- Issue 4 (2024)
- Course
- Physics 4PH1
Exam points
- Plot two-variable data with sensible linear scales, labelled axes and accurate points.
- Draw smooth curves or lines of best fit with points distributed appropriately around them.
- Read values and describe relationships from graphs, including continuous data and non-linear trends.
Covered syllabus points
Question 1
A student uses this apparatus to investigate how the efficiency of an electric motor varies with its input voltage.
This is the student's method.
- connect the electric motor to a d.c. power supply and a joulemeter
- attach a 1.0 kg mass to the electric motor using a length of string
- set the voltage of the power supply to 10 V and switch on the power supply
- switch off the power supply when the mass has been lifted through a distance of 50 cm
- record the input energy to the motor from the joulemeter
- calculate the energy transferred to the gravitational store of the mass
- calculate the efficiency of the motor
The student repeats this process, setting the power supply to a different voltage each time.
Question (a)
(a)
The table shows the student's results.
Question (i)
(i)
Plot a graph of the motor efficiency on the y-axis against the power supply voltage on the x-axis.
Question (ii)
(ii)
Using the graph, determine the minimum power supply voltage that will allow the electric motor to operate at maximum efficiency.
voltage = ............ V
Question 2
This question is about magnetism.
Question (a)
(a)
A student investigates how the length, L , of a current-carrying wire in a magnetic field affects the size of the force on the wire.
The student uses a power supply and keeps the current in the wire constant.
They use the same magnet throughout the experiment.
Diagram 2 shows part of the student's equipment.
Question (i)
(i)
Table 2 shows the student's results.
Table 2
Plot a graph of the results on the grid.
Question (ii)
(ii)
Draw a line of best fit.
Question 3
A student uses this apparatus to investigate how the efficiency of an electric motor varies with its input voltage.
This is the student's method.
- connect the electric motor to a d.c. power supply and a joulemeter
- attach a 1.0 kg mass to the electric motor using a length of string
- set the voltage of the power supply to 10 V and switch on the power supply
- switch off the power supply when the mass has been lifted through a distance of 50 cm
- record the input energy to the motor from the joulemeter
- calculate the energy transferred to the gravitational store of the mass
- calculate the efficiency of the motor
The student repeats this process, setting the power supply to a different voltage each time.
The table shows the student's results.
Using the graph, determine the minimum power supply voltage that will allow the electric motor to operate at maximum efficiency.
voltage = ............ V
Question 4
This question is about magnetism.
A student investigates how the length, L , of a current-carrying wire in a magnetic field affects the size of the force on the wire.
The student uses a power supply and keeps the current in the wire constant.
They use the same magnet throughout the experiment.
Diagram 2 shows part of the student's equipment.
Draw a line of best fit.
Question 5
A student uses this apparatus to investigate how the efficiency of an electric motor varies with its input voltage.
This is the student's method.
- connect the electric motor to a d.c. power supply and a joulemeter
- attach a 1.0 kg mass to the electric motor using a length of string
- set the voltage of the power supply to 10 V and switch on the power supply
- switch off the power supply when the mass has been lifted through a distance of 50 cm
- record the input energy to the motor from the joulemeter
- calculate the energy transferred to the gravitational store of the mass
- calculate the efficiency of the motor
The student repeats this process, setting the power supply to a different voltage each time.
The table shows the student's results.
Plot a graph of the motor efficiency on the y-axis against the power supply voltage on the x-axis.
All question bank results loaded