Parts of a Circuit
What is the name of a path through which electric current flows?
Loop
A resistor has a voltage drop of 5V and 2A of current. How many Ohms does it have?
2.5 Ohms
What do you have to remember to do at the end of finding Req for a parallel circuit?
FLIP the result! (1/Req = 1/R1 + 1/R2 + .......)
In a parallel circuit, what happens if one bulb burns out?
The other bulbs stay lit.
Kirchoffs Loop Rule
How would you describe current on a microscopic level?
The movement of electrons through a wire.
If I have 2 9V batteries connected in series with a 10 Ohm resistor, what is the total current of the circuit?
1.8A
What remains constant in a series circuit: voltage or current?
Current
What remains constant in a parallel circuit: voltage or current?
Voltage
Rule that states that the current entering a split in the circuit must equal the current exiting a split in the circuit.
Kirchoffs Junction Rule
What provides voltage to a circuit?
Battery
There are 2 5 Ohm resistors all in parallel with a 10V power source. What is the total current of the circuit?
4A
Do you think Christmas Lights are an example of a series circuit or a parallel circuit? why do you think that? (Think of the movie "Christmas Vacation")
They are an example of a series circuit because if one of the bulbs burns out the entire strand will not light up.
If two 5Ω resistors are connected in parallel, what is the total resistance?
2.5 Ohm
If a light bulb is rated 60W at 220V, how much current does it draw?
0.27A
What is the function of a resistor in a circuit?
Limits the flow of current
If I increase the Req of a circuit but keep the battery exactly the same. What must happen to the current?
Current must decrease.
If you add more resistors to a parallel circuit, what happens to the total resistance?
Decreases
What remains constant in a series circuit: voltage or current?
current
If I have resistors that are in parallel with one another, what can I say about the voltage drop and current for both resistors?
The voltage drop is the same for both resistors.
The current is split between the two resistors. (Split evenly if the resistors are equal.
What happens if a circuit has no resistance and a high-voltage source?
A short circuit occurs, leading to overheating or fire.
I have 2 parallel loops powered by the same 9V battery. Loop one has 15 Ohms of resistance, and Loop two has 5 Ohms. Which loop will have more current flowing through it and why?
Loop two because current always takes the path of least resistance.
A 9V battery powers a series circuit with three identical bulbs. If the total current is 3A, what is the resistance of each bulb?
1 Ohm
What happens to the total current in a parallel circuit when another branch is added?
It increases
I have resistors that are in series with one another. What can I say about the voltage and current for each resistor?
The voltage will be different through each resistor (voltage drop)
The current will be the same because current never changes unless there is a split in the circuit.