Additional Answer Options: 9.2.2

9.1.1

North pole

Tips: 

• Using Fleming's right-hand 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

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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.

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4 marks

(4 x 1 mark)