total current = 12 A and total power = 3.2kW; [3] Award for correct alternative working. (iv) the power output will be less; because the total resistance is greater in the series case; hence the current is less and power depends on I2; = ; 3 max P (b) (i) concentric circles (by eye); a minimum of three circles required; correct direction; 3 (ii) current in one turn produces magnetic field in region of adjacent turn; this gives rise to force in adjacent turn which also has electric current; they attract; 3 [15]
total current = 12 A and total power = 3.2kW; Award [3] for correct alternative working. (iv) the power output will be less; because the total resistance is greater in the series case; hence the current is less and power depends on I2; P = ; 3 max (b) (i) concentric circles (by eye); a minimum of three circles required; correct direction; 3 (ii) current in one turn produces magnetic field in region of adjacent turn; this gives rise to force in adjacent turn which also has electric current; they attract; 3 [15]
ib-electricity-ws-02-as.docx