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Q:

Which sources produce alternating current (AC)?

A) Solar power plants B) Hydro-electric generators
C) Batteries D) All of the above

Answer:   B) Hydro-electric generators



Explanation:

Alternating Current (AC) is the current in which flow of current is altered periodically whereas in DC current i.e, direct current the flow of current is only in one direction.

Some of the sources of AC current are :

1. Hydro-electric generators

2. Thermal power generators

3. Nuclear  power generators...

Subject: Physics
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