Name ANSWER KEY
Date:_________________
Period:__________
Electricity Pre-Assessment
Ohm’s Law
Conduction
Electric circuit
Voltage
Polarization
Fuse
Friction
Short circuit
Static electricity
Resistance
Insulator
Induction
Static discharge
Conservation of
charge
Third prong
Grounded
Series circuit
Electric Force
Parallel circuit
Power
Electric field
Conductor
Electric circuit
Circuit breaker
1. Short Circuit- is a connection that allows current to take the path of the least resistance
2. Fuse - Are devices that melt if they get to hot. This breaks the circuit.
3. Third Prong- This attaches to the building/house’s ground wire
4. Grounded- Any circuit that is connected to the Earth
5. Circuit breakers- are switches that will bend away from circuits as they heat up.
6. Power - the rate which energy is transformed from one form to another.
7. Series Circuit- All parts of an electric circuit are connected one after another along one path
8. Ohm’s law-States that resistance in a circuit is equal to voltage divided by current.
9. Parallel Circuit- Different parts of the circuit are on separate branches. These are several paths for current to
take.
10. Electric Force- The force between charged object
11. Static electricity The buildup of charges on an object
12. Electric field- is a region around a charged object where the object’s electric force is exerted on other charged
objects.
13. Conduction -the transfer of electrons from one object to another by direct contact.
14. Friction- the transfer of electrons from one uncharged object to another by rubbing the objects together.
15. Conservation of charge- Charges are neither created nor destroyed.
16. Polarization -the process through which electrons are attracted to or repelled by an external electric field,
causing the electrons to move within their own atoms.
17. Induction-A method of redistributing the charge on an object by means of electric field of another object; the
objects have no direct contact.
18. Resistance- is the measure of how difficult it is for charges to flow through an object.
19. Voltage- is the difference in electric potential energy per charge between two points in a circuit.
20. Insulators-are materials such as rubber, that do not allow charges to flow.
21. Electric circuit-A complete unbroken path that charges flow through
22. conductor- is a material through which charge can flow easily
23. Electric current- the continuous flow of electric charges through a material.
24. Static discharge - The loss of static electricity as electric charges transfer from one object to another.
Label the following circuits:
27. A lightning bolt can have a voltage of over 100 million volts. Explain why lighting cannot power your cell phone but a
6-volt battery can. Then explain what would happen if a 100 million volt battery was plugged into a cell phone. Use
Ohm’s law in your answer.
Answer: Cell phones need complete electric circuits in order to work. There is no way to keep the charges in a lightning
bolt moving in a circuit. They go right from the sky to the ground. A 6-volt battery has a much lower voltage, but a
battery can be hooked into a circuit and keep charges flowing continuously. Even if lighting could flow through a circuit,
its high voltage would draw such a large current that it would probably just damage the phone.
Bonus:
How many gigawatts does it take to power the flux capacitor? 1.21 gigawatts