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MAGNETISM |
METHODS OF PRODUCING VOLTAGE (ELECTRICITY)
Basic Electrical Theory
Summary
The important information contained in this chapter is summarized below.
Methods of Producing Electricity Summary
Electrochemistry - Combining chemicals with certain metals causes a chemical
reaction that transfers electrons.
Static electricity - When an object with a normally neutral charge loses electrons,
due to friction, and comes in contact with another object having a normal charge,
an electric charge is exerted between the two objects.
Magnetic induction - Rotating coils of wire through a stationary magnetic field
or by rotating a magnetic field through a stationary coil of wire produces a
potential.
Piezoelectric effect - Bending or twisting certain materials will cause electrons
to drive out of orbit in the direction of the force. When the force is released, the
electrons return to their original orbit.
Thermoelectricity - Heating two joined dissimilar materials will cause a transfer
of electrons between the materials setting up a current flow.
Photoelectric effect - Dislodging of electrons from their orbits by light beams
creates positively-charged objects.
Thermionic emission - Freeing electrons from a hot surface causes electrons to
escape.
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