Fig. 8.1 illustrates the magnetic field arrangement around a bar magnet.
Fig. 8.1 depicts a bar magnet with poles marked S and N, together with magnetic field lines showing arrows.
Fig. 8.2 illustrates two bar magnets producing a uniform magnetic field. The labels shown are: bar magnet; separation of poles; uniform magnetic field; current-carrying wire; poles N and S.
(a(i))[3]
Describe an experiment that shows the pattern and direction of magnetic field lines around a bar magnet as shown in Fig. 8.1. You may add to Fig. 8.1 as part of your answer.
(a(ii))[1]
State one material that can be used to make a permanent bar magnet.
(b(i))[1]
The student wants the force on the wire to act in the opposite direction. State one change that would reverse the direction of the force on the wire.
(b(ii))[2]
State and explain how increasing the separation changes the force on the current-carrying wire.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “using a (plotting) compass OR iron filings” …