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Reading:
What are the basics of electricity?
The main parts of an amplifier are voltage, current, resistance and electrical charge.
Because an amplifier is a device that increases the voltage, current or power of a
signal.
Electricity is the movement of electrons on a circuit and electrons create charge. Many
electronical devices such as microphones, loudspeakers, radio benefit from the
movement of electrons. George Simon Ohm being a German physicist, studied on
electricity.
Voltage is the amount of potential energy between two points on a circuit. One point
has more charge than the other. The difference between these two points is called
voltage and measured in volts. Voltage invented by Alassandro Volta, is demonstrated
by the letter “V”.
Current is the amount of charge flowing through the circuit over a certain period of
time. Current is measured in Amperes, shortly pronounced “Amps”. An Ampere is
defined as 6.241*1018 electrons (1 Coulomb) per second passing through a point in a
circuit. Thus, 6.24*1018 electrons have 1 C of charge. Amps are represented by the
letter “I”.
Resistance refers to the hindrance to the flow of charge. In other words, resistance is a
measure of how much an object opposes the passage of electrons. The unit of
electrical resistance is the ohm and it is represented by “Ω”.
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