Alternators and Dynamos | GCSE Physics Practice
Alternators and dynamos use the generator effect to produce electricity, but with different types of current.
Which one uses split-ring commutators instead of slip rings?
What is Alternators and Dynamos | Practice?
"The comparison between generators that produce alternating current (alternators) and those that produce direct current (dynamos)."
Magnetic field lines always point from ____.
Why are step-up transformers used in the National Grid?
Increasing the current through a solenoid will ____ its magnetic field.
What happens to an electromagnet when the current is turned off?
DC vs AC Gen
Alternator: Uses slip rings and brushes to produce Alternating Current (AC).
Dynamo: Uses a split-ring commutator to produce Direct Current (DC).
Both use a rotating coil in a fixed magnetic field (or vice versa).
The output PD is maximum when the coil is parallel to the field lines.
Visual Guide: On an oscilloscope, an alternator shows a sine wave; a dynamo shows a "bumpy" but always positive line.
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