Electric Charge
Electric Current
Electrical Energy
Review 1
Review 2
100
Electric charge that has accumulated on an object.
What is static electricity?
100
A circuit that has two or more separate branches for current.
What is a parallel circuit?
100
Resistance is measured in this.
What is ohms?
100
Has a small piece of wire that melts.
What is a fuse?
100
The tendency of a material to oppose the flow of electrons.
What is resistance?
200
A material through which electrons do not move easily.
What is an insulator?
200
No current flows in this type of circuit.
What is an open circuit?
200
The rate at which an electrical device converts energy from one form to another.
What is electrical power?
200
Most batteries are this.
What are dry cell batteries?
200
Contains a piece of metal that bends when overheated.
What is a circuit breaker?
300
Static discharge differs from an electric current in that static discharge......
What is only lasts for a fraction of a second?
300
Which of the following is the correct relationship among power, current, and voltage? W=A / V V=W X A W=V X A O=W X A
W=V X A
300
Current is equal to the voltage difference divided by the resistance.
What is ohm's law?
300
Name a device that is designed to open an overloaded circuit and prevent overheating.
What is a circuit breaker or fuse?
300
One source of constant electric current. Switch Transformer Dry cell Coulomb
What is a dry cell?
400
A very large discharge of static electricity.
What is lightning?
400
A path that allows only one route for a current.
What is series circuit?
400
A television that requires an average of 0.40 ampere of current is operated on a 120-volt service for 5.0 hours. How much energy is used (kWh)?
What is 0.24 kWh?
400
The voltage _________ as current moves through a parallel circuit? Remains the same Varies Doubles Increases
What is remains the same?
400
If the reading on an electric meter in December was 2345 kilowatt-hours and the reading in January was 3456 kilowatt-hours, how much electrical energy was used in the one-month period between December and January?
1,111 kilowatt-hours
500
What causes lightning?
A transfer of charge through the air between two objects because of a buildup of static electricity. As the electric charges move through the air, they collide with atoms and molecules. These collisions cause the atoms and molecules in air to emit light.
500
Suppose you have purchased a string of lights. You want to find out if the lights are wired in a series or parallel circuit. How could you quickly determine how the lights have been wired?
Unscrew one of them. If it is a..... Series circuit - all the lights after the unscrewed bulb will be out. Parallel circuit - only the unscrewed bulb will be out.
500
If a current flowing through a light bulb is 0.75 ampere and the voltage difference across the light bulb is 120 volts, how much resistance does the light bulb have?
What is 160 ohms?
500
If an air conditioner uses 1800 watts of power when plugged into a wall socket that operates at a voltage of 210 volts, what is the current flowing through the air conditioner?
What is 8.57 amps?
500
If you used 1,111 kilo-watt hours of energy in a month and were charged $.10/kWh, what would your bill be?
$111.10
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