- Mark Scheme Question Answer Marks 1 1. force of repulsion circled (1) 2 2. no force circled (1) 2 place ends / poles together (1) 2 repulsion (takes place) (1) 3 correct field pattern for bar magnet (1) 3 no lines crossing and good detail of curvature (1) correct direction of arrow i.e. out from N pole (1) 4 5 steel any one from: sorting scrap metal doorbell relay (electric) motor circuit breaker 1 1 AO Element / Notes Guidance - Mark Scheme Question 6(a) Answer predictions: one end attracts AND the other end repels (1) Marks 2 reason: like poles repel OR unlike poles attract (1) 6(b) they attract (1) 2 (because) steel forms a permanent magnet owtte (1) 7 any two from: 2 iron bar becomes induced magnet with S pole nearest to (N pole of) magnet opposite poles attract 8 can be switched on / off OR magnetised / demagnetised (easily) 1 9 poles correctly labelled 1 S N 10(a) either N and N OR S and S facing each other 1 10(b) repel / repulsion 1 AO Element / Notes Guidance - Mark Scheme Question 10(c) Answer Marks attracted OR steel bar moves towards magnet A 1 11 ends of coil connected to power supply OR battery OR cell 1 12 place magnet in coil (1) 3 EITHER (gradually) withdraw magnet (1) with ac (in coil) switched on (1) OR reduce current (1) to zero (1) 13 (soft) iron (1) (forms a) temporary magnet (1) 2 AO Element / Notes Guidance - Mark Scheme Question Answer Marks 14 N and S labelled at either end of magnet (1) 4 correct field line shown above magnet (1) correct field line shown below magnet (1) field points in direction N to S (1) 15(a) electromagnet 1 15(b) (soft iron) filings attracted, but (most) fall off when switch opened 1 15(c) (steel) (most / more / they) remain attached when switch opened 1 AO Element / Notes Guidance - Mark Scheme Question 16 Answer any 5 from: Marks 5 current in circuit / coil(s) coil becomes electromagnet owtte (coil / electromagnet) attracts (soft iron) armature (so) hammer hits gong circuit is broken (at A / contact screw) electromagnet loses magnetic field / stops working armature springs back cycle repeats 17 steel / nickel / cobalt 1 18 any two from: 2 pole of magnet placed on/near steel rod magnet stroked along rod owtte repeat strokes same direction AO Element / Notes Guidance - Mark Scheme Question 19 Answer place pole of rod next to a known magnet (1) Marks 2 like poles repel (1) 20 iron loses magnetism easily owtte or reverse argument 1 21 electromagnet 1 22 would not be effective OR no (1) 3 EITHER: with current on OR the (alternating) current should not be switched off (1) magnet should be withdrawn from the coil (1) OR: magnet would be alternately magnetised in different directions (1) would remain magnetised in the direction occurring at the moment of switching off (1) 23 A - Insert the watch in a solenoid that carries alternating current and then slowly remove it. 1 AO Element / Notes Guidance - Mark Scheme Question Answer Marks 24(a)(i) variable resistor indicated 1 24(a)(ii) (steel) bar inside coil 3 switch closed OR current increased through coil bar moved through coil (in same direction) OR current decreased and switch opened 24(b) at least one complete correct field line through and above coil 2 at least one complete correct field line through and below coil 25 steel 1 26 coil of wire (1) 3 iron rod inside (1) coil connected to an (electrical) power supply OR current in coil (1) 27 place end to end / see if attraction / repulsion occurs repulsion at one end 2 AO Element / Notes Guidance - Mark Scheme Question 28(a)(i) Answer two curved field lines drawn above and below the magnet Marks 2 lines start and finish at the poles of the magnet 28(a)(ii) both arrows point left 1 28(a)(iii) (plotting) compass 1 29(a) any four from: - charge flows OR current in solenoid / wire / circuit - solenoid becomes magnet / magnetised - bolt becomes magnet / magnetised - (such that) unlike poles (of solenoid and bolt are) facing o.w.t.t.e. - bolt is attracted - bolt moves / (door) locks / spring stretched 4 29(b) solenoid / bolt no longer magnetised OR bolt no longer attracted 2 (spring contracts and pulls) bolt back / bolt returns (to original position) / (door) unlocked AO Element / Notes Guidance - Mark Scheme Question 30 Answer C - The current in the coil of wire creates a magnetic field. Marks AO Element / Notes Guidance 1 [Total: 72]
