Download Topics to study for electrostatics and electricity test

Electricity Review
Define the following words:
Static electricity
Electric current
Voltage
Wet cell
Direct current
Alternating current
Series circuit
Parallel circuit
Conductor
Insulator
Circuit breaker
Fuse
Know these units:
Electric current – Amperes (A)
Resistance – ohms
Voltage – volts (V)
Power – Watts (W)
Energy – kilowatt-hour
Be able to:
Understand what charges attract and what charges repel
Understand what particles are positive, negative, and neutral in an atom
Understand that electrons are the particles that move in both buildup of static
electricity and in electric current
Give an example of a wet cell
Give an example of a dry cell
List some devices that use direct current
List some devices that use alternating current
List the parts of a circuit and what they do
Understand the difference between parallel and series circuits and advantages of
the parallel circuit
Know the difference between a circuit breaker and a fuse
Review your labs on electricity and magnetism
Use the equation : voltage = resistance x current
Use the equation: power = voltage x current
Use the equation energy = power x time
Be able to convert from watts to kilowatts
(1 kW = 1000 Watts)
Review questions:
1. What particles are moving when an object becomes electrostatically charged?
2. Name three good solid conductors of electricity.
3. Name a good liquid conductor of electricity.
4. Name three good insulators.
5. Give two reasons why copper wires that carry electricity need to be insulated.
6. Describe two ways in which the resistance of a wire can be increased.
7. Calculation practice:
A light bulb operates at 60 volts and 2 amps
a) What is the power of the light bulb (in watts)?
b) How much energy in kilowatt- hours does the light bulb need in order to operate for 8
hours?
c) What is the cost of operating the bulb for 8 hours at a rate of 7 cents per kilowatthour?
8. Name the 4 parts of an electric circuit.