9.1.1

North pole
Tips:
 Using Fleming's righthand generator rule, when the force on side XY of the coil is upwards and the current is shown going from X to Y, the magnetic field must point away from Magnet pole A.
 The magnetic field always points away from the north pole and towards the south pole, therefore, making A the north pole.

1 mark

9.1.2

Y to X
Tip: the diagram shows an alternating current generator which means that the direction of the current changes every 180°. Therefore, the current will flow from Y to X.

1 mark

9.1.3

Tips:
 The coil originally starts from a horizontal position which corresponds with the maximum (or minimum voltage).
 Since it is an AC generator, the potential difference graph looks like a cos graph.
 Two complete revolutions mean starting and ending at the same maximum with another maximum in the middle.

3 marks
(3 x 1 mark)

9.2.1

How to approach this question:
 Since the maximum current of 6A is given and the V_{rms} given is 200V, both values must be the rms or the max values to be able to calculate the resistance.
Option 1
There are more ways to answer this question. To view other options, click here.

4 marks
(4 x 1 mark)

9.2.2

Option 1
Tips:
 The energy consumed by the device is given by the symbol W.
 There are several different ways to calculate the energy consumed. You should use V_{rms} and I_{rms }values regardless of which of the equations you select.
There are more ways to answer this question. To view other options, click here.

4 marks
(4 x 1 mark)
