O-LevelPhysicsMagnetism5054/11 · May/June 2019 · Q291 Mark
Two vertical wires pass at right-angles through a piece of card. There is a large current in each wire in the direction shown. A plotting compass is placed on the card. Which diagram shows the direction in which the needle of the plotting compass points?
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.
ADiagram showing a plotting compass needle pointing upwards, away from the wires.
BDiagram showing a plotting compass needle pointing left, parallel to the line connecting the wires.
CDiagram showing a plotting compass needle pointing downwards, towards the wires.
DDiagram showing a plotting compass needle pointing right, parallel to the line connecting the wires.
✓ Correct answer
C: Diagram showing a plotting compass needle pointing downwards, towards the wires.
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