What is a power or voltage source (ex: battery), conducting material (wires), and a load or something that can convert/use the electrical energy(ex: a light bulb, appliance)?
100
This is the opposition to the flow of charges in a material
What is resistance?
100
These are the three ways charge may be transferred between objects
What are friction, contact (conduction), and induction?
100
Answer this question by filling in the blanks:
A gain of electrons will cause the object to become ______________ charged while a loss of electrons will cause an object to become _____________ charged
What is negatively, positively
200
This is the SI unit for current
What is the ampere?
200
This is the difference between a series and a parallel circuit
What is in a series circuit charge has only one path through which it can flow and in a parallel circuit there are two or more paths through which charges can flow?
200
This is the continuous flow of electric charge or the rate at which charges flow
What is current?
200
Rubbing a balloon on your head causes your hair to stand on end. This is an example of this type of electric transfer
What is friction?
200
An iPod player with a resistance of 40 ohms has a current of 0.1 amps flowing through it. How many volts supply the iPod player?
What is 4 volts?
300
This is the SI unit of resistance
What is the ohm?
300
In which type of circuit will the current decrease as the number of bulbs increase
What is a series circuit?
300
This is the force that make charges flow or potential difference between two places in an electric field
What is voltage?
300
This is a temporary charge imbalance caused by bringing a charged object near a neutral object
What is induction?
300
An electric oven receives 240 volts of electricity. If it uses 32 amps of current, what is the resistance of the oven?
What is 7.5 ohms?
400
This is the SI unit for electric power.
What is watt? (usually measured in kilowatts)
400
This is one similarity and one difference between a circuit breaker and a fuse
What is both are used to prevent fires in case of a short circuit? A fuse prevents current overload by melting metal, while a circuit breaker is a switch that opens when current is too high.
400
This is the difference between an alternating and a direct current. Give an example of where each is used.
What is in a direct current charges from in one direction and in an alternating current the flow of electric charge reverses its direction? DC: a flashlight or battery operated devices, AC: home and school
400
This is the definition of static discharge and when it might occur
What is transfer of charge between two objects that occurs when charges suddenly find a pathway to move through; lightning
400
An electric oven is connected to a 240 V line and uses 34 A of current. What is the power used by the oven?
What is 8200 W or 8.2 kW?
500
This is the SI unit for electric energy
What is the Joule? (often measured in kilowatt-hours)
500
List three safety rules when working with electricity
What is 1) don't overload a circuit by plugging in too many appliances 2) don't damage the insulation in a wire 3) avoid touching electrical devices with wet hands 4) don't tuck wires under the carpet?
500
These are three factors that affect resistance. Example why each affects resistance in your answer.
What is length (more time to travel), thickness (wider- more room for electrons to move), temperature (cooler, less collisions)?
500
These are two factors that affect the strength of an electric field
What is the amount of charge that produces the field and the distance from the charge
500
This is the electric energy used by a clothes dryer that uses 5400 watts for power for 120 minutes. HINT: Make sure your answer is in kW/hr!