Fig. 9.1 presents a laptop together with a charger. Inside the charger is a step-down transformer.
(a(i))[1]
Explain what a step-down transformer does.
(a(ii))[1]
State the material used for the two coils of the transformer.
(a(iii))[3]
Calculate how many turns are on the output coil.
(b)[2]
State two advantages of transmitting electricity in this manner.
1.
2.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “It changes a higher voltage into a lower voltage (owtte).” …