Question 9

9.1.1 Is this machine a DC motor or a DC generator? (1)

9.1.2 Write down the energy conversion that takes place while this
machine is in operation. (2)

9.1.3 Write down the name of component A in the diagram. (1)

9.1.4 In which direction will the coil, shown in the diagram above, rotate?
Choose from CLOCKWISE or ANTICLOCKWISE. (2)

9.2 An electrical device is marked 200 W ; 220 V.

9.2.1 Define the term rms voltage. (2)

9.2.2 Calculate the resistance of the device. (3)

This device is now connected to a 150 V AC source.

9.2.3 Calculate the energy dissipated by the device in 10 minutes. (5)

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