Electrical Science
Describe the basic structure of the atom
What is Atoms are made of small particles called protons, neutrons, and electrons
What is the difference between static electricity and dynamic electricity?
What is Static electricity is the result of a standing charge while dynamic electricity is in motion.
What is current?
What is the flow of electrons through a circut?
What is the difference between direct current and alternating current.
What is Direct current flows in one direction, alternating current regularly reverses flow?
What is Ohm’s law?
What is A mathematical formula that describes the relationship between volts, amps, and ohms. E=IR
What is a free electron?
What is Electrons that have escaped their atomic bonds are called free electrons.
What is the difference between a generator and an alternator?
What is a generator rotates coils of wire inside a magnetic field, while an alternator rotates a magnetic field inside coils of wire.
What is resistance in an electrical circut?
What is the opposition to the flow of electric current in a circuit?
What is meant by the frequency of AC current?
What is The frequency of AC current is the number of cycles per second.
What is the current draw of a circuit with a resistance of 6 ohms when 120 volts is applied to the circuit?
I = E/R: I = 120 volts / 6 ohms, I = 20 amps
Why is copper a good conductor?
What is Copper has a large number of free electrons because it has a single electron in its outer energy level that can be easily freed.
What is an example of the use of static electricity in the HVACR field?
What is Air filters with a static electric charge.
What is electric potential?
The ability to make current flow is called electromotive force or potential.
What three elements are required for all electric circuits?
What is Source, path, and load?
What is the resistance of a circuit operating with a current draw of 5 amps and 30 volts?
What is R = E / I R = 30 volts / 5 amps, R = 6 ohms?
What type of charge does an electron have?
What is a negative charge
What precautions should be taken before handling printed circuit boards?
What is Always discharge yourself by touching the equipment frame to discharge any static electricit
What is the measurement of electric potential?
What is volts
What are the three types of path arrangements for circuits.
What is series, parallel and series-parallel
What voltage is being supplied to circuit with a resistance of 25 ohms and a current draw of 5 amps?
What is E = I R E = 5 amps × 25 ohms E = 125 volts
What is a coulomb?
The coulomb is the measure of electrical charge. One coulomb is equal to the charge of 6.241506 * 10^18 electrons
What is the relationship between current and resistance in an electrical circuit.
What is When resistance increases, current decreases. When resistance decreases, current increases.
What is the difference between a short circuit and on open circuit?
What is An electrical circuit that contains a source and path without a load is called a short circuit. A circuit that contains a source and load without a path is called an open circuit.
Calculate the electric power for a 6-volt DC circuit drawing 2 amps.
What is P = I E P = 2 amps × 6 volts P = 12 watts