Definitions
What is it called when there is a single path for current to flow in a circuit?
What equation is given by Ohm's Law?
V=IR
What will happen if a switch wired in series with a circuit is flipped open?
current will not flow
What is the total resistance of two 5-ohm resistors wired in series?
10 ohms
What are the units of voltage?
Volts
What is the flow of charge through a conductor?
Current
According to Kirchoff's laws, what must be true about the current entering a leaving a node?
They must sum to the same value.
What will happen to the overall resistance of a circuit if a resistor is added in parallel?
Resistance will decrease
What is the total resistance of two 2-Ohm resistors wired in parallel?
1 Ohm
What is measured in Amps?
Current
What is the potential difference between two positions in an electric field?
voltage
What do we know about the voltage drop across two paths wired in parallel?
They must be the same
What will happen to the current in a circuit if resistance is increased?
Current will decrease
How much voltage would you need to apply to a 10-ohm resistor to draw 1.2 Amps of current?
12 V
What unit is represented by the Greek letter Omega?
Ohms
What is resistance?
The degree to which an object impedes current.
What equation would you use to find the amount of energy used if given power and time?
W=Pt
What will happen to the resistance of a short, thick wire if it is stretched into a long, thin wire?
Resistance will increase.
How much current will a 9 V battery draw in a circuit with two 1.5-ohm resistors wired in series?
3 A
What unit is equal to 3,600,000 joules?
1 kWh
What is electrical power?
The rate at which electrical work is done
What equation can you used to find power given current and resistance?
P=I2R
How will the brightness of two lightbulbs wired in parallel compare to the brightness of those bulbs wired in series?
they will be brighter
How much current will a 6 W lightbulb draw with 120V applied?
0.05 A
What is the unit that is equivalent to 1 Coulomb/second?
Amp