Electricity Bee Week 3 Flashcards
Explain Ohm’s Law in your own words.
How electrical current is proportional to the voltage of something and how inversely is proportional to the resistance of something. Electrical current is the opposite of resistance.
If asked to solve for one variable in Ohm’s law, use the triangle method to give the correct formula.
V=IR
What is voltage and how are they measured?
It is an electrical tension measured in volts, which push currents around the circuit.
What is current and how is it measured?
The number of charged particles that pass by per second that are measured in amps.
What is resistance and how is it measured?
The opposite flow of current in a circuit. The higher the resistance, the slower the current. Measured in Ohms.
How do you calculate electrical energy? Power?
You need to know the power in watts and the seconds that it is being used. Which is equal to the total energy being used. It is measured in watts*seconds.
Who was Ohm and what did he do?
George Simon Ohm is a famous physicist who discovered the strength of a current in a wire. He is known for the Ohm law and has received the Copley Medal. He also was a mathematician.
Name one of the Electricity Heroes and describe why he or she is important.
Thomas Edison because he invented the light bulb. We do a lot of things in light and if he didn’t invent it, there would be so many things that we couldn’t do.
Do electrons “flow” through a wire?
Yes the transfer from atoms is how they flow
Does energy flow through a wire at the same rate as electrons?
Though electrons do move, their movement is not equal to the transfer of the energy so the transfer does not occur at the same speed.
Name three conductors and how and why they “conduct?”
Copper, Gold, and Water. They work because the electrical current can flow freely unlike in an insulator.
Name three insulators and how and why they “insulate?”
Three insulators are oil, glass, and rubber. The way that insulators work is that the heat flow slows down.
Explain how power can kill you – is it volts, amps, conductivity or “wetness” that matters?
The power that kills you is the Amps and the volts combined and if you are wet it makes it even more likely for you to get killed by power.
What is the difference between electrical power and electrical energy?
Power is the rate, energy is the consumption or generation.
How do DC electric motors work?
The DC motor is a machine that transforms electrical energy into mechanical energy in the form of rotation. Its movement is produced by the physical behavior of electromagnetism. DC motors have inductors inside, which produce the magnetic field used to generate movement.
