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Physics
The branch of science concerned with the properties of matter and energy and the relationships between them.
17Categories 45113Terms
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Physics > Electromagnetism 
alternating current
Physics; Electromagnetism
An electric current that once moves in one direction, then in opposite direction with a regular frequency.
alternating current
Physics; Electromagnetism
It is the form is electric power of which electric energy is transferred by an electric circuit. The flow of electric charge periodically reverses direction. It is produced by ...
hydroelectrics
Physics; Electromagnetism
Electricity generated by hydro-power. The power through the use of the gravitational force of falling or flowing water.It is the most widely used source of renewable energy. ...
lightning ball
Physics; Electromagnetism
It's lightning that appears in the form of a sphere and travels slowly while hovering a few feet above the ground. It's an extremely rare phenomenon and even today no scientists ...
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