The current across a wire is 1 amp and the voltage is 100 v, what is the resistance?
What is 100 ohms (R=V/I=100/1)
100
How are electric currents and water alike?
What is both can do work and have potential energy. Both must flow through a closed loop to flow continuously.
100
Draw a parallel and series circuit.
What is see the board.
100
Define static charge
What is buildup of electric charge in an object
100
What is a science teacher's favorite type of dance?
What is the electric slide.....hahahahaha!!!!
200
Your teacher gives you a lab with wires and batteries. If the wire has a resistance of 20 ohms and you attach it to a 20v battery, how much current is flowing through the wire?
What is 1 amp (I=V/R=20/20)
200
Why are there 2 terminals on a battery?
What is the positive charged ion collect at the positive end and the negative charges ions collect at the negative end. If there was only one terminal they would not stay separated so they would not be charged and there would be no voltage.
200
How are ions created?
What is electrons move from atoms to other atoms, creating negative and positive charged ions.
200
Define voltage
What is how much electric energy is in an object
200
what kind of wire (describe the dimensions) has the LEAST resistance?
What is short and thick
300
How much current flows through a 120-W vacuum connected to a 100-volt source?
What is 1.2 amperes (I=P/V=120/100)
300
What kind of wire do we use in the filament of a lightbulb and why?
What is tungsten, because it has a high resistance and produces a bright light as current passes through it.
300
In order to create electric energy you must charge atoms into positive and negative ions. Why dont the positive ions with extra protons split apart and break up the nucleus?
What is the strong nuclear force keeping it together is more than the electrical force pulling it apart.
300
Define electric field
What is field from which electric charges are exchanged with another charge at a distance
300
Electric companies use what unit for electrical energy?
What is kilowatt-hours
400
A vacuum requires 0.5 Amps to operate on a 100 volt outlet. What is the power usage?
What is 50 watts (P=IxV=0.5x100)
400
What happens to the resistance of a device if the current increases and the voltage stays the same?
What is according to Ohm's Law (R=V/I) so, the resistance would decrease.
400
What are conductors and insulators (define and give an example of 2 each)
What is conductors - electrical energy flows easily through them (metals, water), insulators - electrical energy does not flow easily through (plastic, wood, rubber)
400
Define circuit
What is a continuously flowing closed loop
400
How does an electric field get stronger?
What is move the item closer to a charge
500
If you have a vacuum with a resistance of 25 attached to a current of 30, how much power is needed to run the vacuum?
What is 22,500 watts. (V=IxR=30x25=750, P=IxV=30x750=22500)
500
How can you tell if something is wired in series or parallel?
What is if you disconnect one part and everything stops working it is connected in series. If you disconnect one part and only a section stops working it is connected in parallel.
500
What does grounding do?
What is grounding causes excess charge to drain into the earth which can absorb the excess charge because it is so large and makes the electric energy neutral.
500
Define resistance
What is the measure of how difficult it is for electrons to flow through a material
500
What happens to resistance as the amount of electrical energy lost as heat and light increases