Physics 5054/31 — October/November 2022
Cambridge O-Level · Practical Test · worked solutions for every part, with the mark scheme
Topics Experimental Contexts · Observations and Measurements · Analysis, Conclusions and Evaluation · Use of Techniques, Apparatus and Materials · Planning Experiments and Investigations
In this experiment you will investigate the range of a magnetic field using a plotting compass.
You are provided with:
- a bar magnet
- a plotting compass
- a metre rule.
Fig. 1.1 shows a plotting compass. The magnetic needle is mounted on a pivot so that it can rotate.
Without removing the compass from the table, check that the magnetic needle is able to rotate freely.
Describe how you did this.
Place the plotting compass over the 1 cm mark on the metre rule. Arrange the apparatus so that the scale markings on the rule point in the same direction as the needle as shown in Fig. 1.2.
Describe an experiment to find the maximum distance from the compass at which the bar magnet causes the magnetic needle to start to deflect.
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