G.O. (Basic Electricity) Flashcards
What is the basic unit of voltage?
The Volt.
What is the basic unit of current?
The Amp
What is the basic unit of resistance?
The Ohm
Which law of electricity is the most important for an aircraft mechanic to know?
Ohm’s Law
What are the three elements in Ohm’s law?
Voltage, current, and resistance (volts, amps, and ohms).
What are five sources of electrical energy?
Magnetism, chemical energy, light, heat and pressure.
What four things affect the resistance of an electrical conductor?
The material, the cross-sectional area, the length and the temperature.
How can you tell the resistance of a composition resistor?
By a series of colored bands around one end of the resistor.
What three things must all electrical circuits contain?
A source of electrical energy, a load to use the energy, and conductors to join the source and the load.
What is the purpose of a capacitor?
To store electrical energy in electrostatic fields.
What is the basic unit of capacitance?
The Farad
Why should electrolytic capacitors not be used in an AC circuit?
They are polarized. An electrolytic capacitor will pass current of one polarity, but will block current of the opposite polarity.
What is meant by inductance?
The ability to store electrical energy in electromagnetic fields.
What is the basic unit of inductance?
The Henry
What is meant by impedance?
The total opposition to the flow of alternating current. It is the vector sum of resistance, capacitive reactance and inductive reactance.