PH-1631
Magnetic effect of a current
Physics · Secondary 4 · Medium · Magnetic effect of a current
A long straight wire carries a current vertically upwards. Which statement correctly describes the magnetic field pattern around the wire?
- Straight lines parallel to the wire, pointing upwards
- Straight lines parallel to the wire, pointing downwards
- Concentric circles around the wire, anticlockwise when viewed from above
- Concentric circles around the wire, all pointing towards the wire
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