ELECTRICAL RESISTANCE
3 marks · NormalA student measures the voltage and current across a piece of wire in an experiment. The results are shown in the table.
| Voltage (V) | Current (A) |
|---|---|
| 0.0 | 0.0 |
| 0.5 | 0.12 |
| 1.0 | 0.25 |
| 1.5 | 0.37 |
| 2.0 | 0.50 |
On graph paper, plot a graph of current (y-axis) against voltage (x-axis). Draw the best-fit straight line and label both axes with units.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
Must show: All points plotted correctly, Best-fit straight line, x-axis: Voltage (V), y-axis: Current (A)
Common mistakes: Switching axes; not labeling axes
Show mark scheme and worked solution
Marking points
M1 · 1 mark · Plots all points accurately.
A1 · 1 mark · Draws a best-fit straight line.
B1 · 1 mark · Both axes correctly labeled with units.
Worked solution
Plot each voltage/current pair as a point. Draw a straight line of best fit passing through the origin. Label axes: x-axis: Voltage (V), y-axis: Current (A).