Does the image above show a dynamo or an alternator? 

Dynamo

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What type of electrical current does an alternator produce?

An alternator produces alternating current

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As the coil of an alternator rotates faster, what happens to the oscillations of the current?

The peaks become larger, and more frequent.

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In an alternator, do the contacts swap every half turn?

No

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In a dynamo, do the contacts swap every half turn?

Yes

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What type of electrical current is produced by a dynamo?

A dynamo produces direct current.

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Which of the above oscilloscope graphs represents direct current?

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What name is given used for the part of an alternator highlighted above?

Slip ring and brushes

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