Electric Current
Ohm's Law
Electric Power
Equation Familiarization
Random
100
This is the difference in electric potential between two points, measured in volts (Hint: "voltage" is not the answer I'm looking for).
What is potential difference/voltage difference?
100
This is the property of a material that resists electric current.
What is electrical resistance?
100
This is the rate of energy transfer, or the rate of doing work; the amount of energy per unit time, which can be computed as the product of current and voltage:
What is electric power?
100
How much current is drawn by a 100-Ω resistor when a voltage of 20 V is impressed across it?
0.2A
100
In what direction does heat move in a conducting material?
From warm to cold (from high thermal energy to low thermal energy)
200
Flow of charge persists as long as there is . . .
What is potential difference?
200
The relationship among voltage, current, and resistance is summarized by . . .
What is Ohm's law?
200
These are the three kinds of light bulbs we looked at, in order from least efficient to most efficient:
incandescent, fluorescent, and LED
200
How much current is drawn by a 75-Ω resistor when 15 V is applied?
0.2 A
200
When does the flow of heat cease in a conducting material?
When both ends of the material reach the same temperature
300
This is the flow of electric charge that transports energy from one place to another.
What is electric current?
300
Electrically charged particles flowing in one direction only is called . . .
What is direct current (dc)?
300
This is any path along which electrons can flow
What is a circuit?
300
What is the resistance of a toaster that draws 8 A when connected to a 240-V circuit?
30Ω
300
What kind of circuits are each of the following?
Left: Series
Right: Parallel
400
Generators and chemical batteries are useful in electric circuits for . . .
maintaining a steady flow of electric charge (current), maintaining potential difference.
400
There must be a ______________________ between one part of your body and another part for you to receive a shock
There must be a difference in electric potential between one part of your body and another part for you to receive a shock
400
This is an electric circuit in which devices are connected along a single loop of wire such that the same current is in each device.
What is a series circuit?
400
What is the resistance of a hair dryer that draws 6 A when connected to a 120-V circuit?
20Ω
400
Power utility companies do not sell ______. They sell _____.
Power utilities do not sell electrons. They sell energy. You supply the electrons.
500
Fill in the blank: 1 A is the flow of 6.25 X 10^18 electrons per second, or 1 ______ per second.
What is a coulomb?
500
Electrically charged particles that repeatedly reverse direction, vibrating about relatively fixed positions, is called . . .
What is alternating current (ac)?
500
This is an electric circuit in which electrical devices are connected in such a way that the same voltage acts across each one, and any single one completes the circuit independently of all the others.
What is a parallel circuit?
500
What is the voltage across a microwave oven with a resistance of 22 Ω that draws 10 A?
220V
500
This is the name of the Greek letter used as the symbol for ohms
What is omega (Ω)?