Graphs of Potential Difference in the Coil Flashcards

All 5 cards in this deck

What shape is the potential difference–time graph produced by an alternator?

A sine wave that alternates between positive and negative values, crossing zero twice each turn.

What shape is the potential difference–time graph produced by a dynamo?

A series of humps all on the same side of the time axis (all positive or all negative), touching zero twice each turn.

How does the potential difference–time graph change if the generator coil is turned faster?

The peaks become higher and closer together (larger amplitude, shorter period / higher frequency).

How does the potential difference–time graph change if a stronger magnet is used, with the coil turned at the same speed?

The peaks become higher, but the period and frequency stay the same.

True or false? The output graph of a dynamo goes below the time axis.

False. A dynamo produces dc, so the graph stays on one side of the time axis.