O-LevelPhysicsMagnetism5054/22 · May/June 2014 · Q75 Marks
Fig. 7.1 shows a compass needle near a bar magnet. Magnetic poles are shown on the compass needle and on the magnet. A finger stops the compass needle from turning. [Figure 7.1]
- (a)(i)The magnet causes a force on the S-pole of the compass needle. On Fig. 7.1, draw an arrow from the S-pole of the compass needle to show the direction of this force.[1]
- (a)(ii)Explain why the compass needle turns when the finger is removed.[1]
- (b)A small compass is used to plot the magnetic field lines of the magnet. Describe how the compass is used to plot magnetic field lines on a piece of paper.[3]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (May/June 2014). The mark or mark type is shown in brackets.
- [B1] (a) (i) horizontal arrow to right (by eye)
- [B1] (ii) forces/resultant causes moment or (turns because) force is not at pivot
- [B1] (b) mark made at one end/pole/direction of compass (on paper)
- [B1] move compass so that other end of compass is on mark and remark
- [B1] join marks made as compass moved on in some way (to draw line)
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