A student uses a bar magnet to tell an unlabelled magnet apart from an iron bar.
(a)[2]
Describe how the student can work out which is the magnet and which is the iron bar.
(b)[3]
Describe and explain what occurs when switch S is closed.
(c)[3]
On Fig. 10.3, sketch the magnetic field-line pattern produced by the current in the wire. Show the field direction.
Worked solution & mark scheme
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