(a(i))[4]
Draw on Fig. 8.1 four complete magnetic field lines to show both the pattern and direction of the magnetic field inside and outside the solenoid.
(a(ii))[1]
Mark a point inside the box in Fig. 8.1 where the magnetic field is strong. Call this point B. Explain how the diagram indicates that the magnetic field at B is strong.
(b(i))[1]
Complete the circuit in Fig. 8.2 by adding the symbol for a direct current (d.c.) power supply.
(b(ii))[2]
Explain why the soft iron arm pivots so that the striker hits the bell when the switch is closed.
(b(iii))[2]
Explain why the arm returns to its original position after the striker hits the bell.