Ohm's Law
Circuits
Circuit Grab Bag
Total Resistance
100
What are the 3 formulas for Ohm's Law?
V = IxR
I = V/R
R = V/I
100
True or False: A parallel circuit has one pathway for the current to take.
FALSE
100
List the four ways you can change the resistance of a wire.
Temperature
Thickness
Length
Material
100
A series circuit has two resistors: 3 ohms and 5 ohms. What is the total resistance?
8 ohms
200
Voltage increases when current increases.
Voltage decreases when resistance ______________.
increases
200
As additional resistors are added to a series circuit, what happens to the brightness of light?
They would dim
200
DOUBLE JEOPARDY:
What is a resistor?
A device in electrical circuits that uses electrical energy to interfere with the flow of electric charge and slow it down.
200
A parallel circuit has two resistors: both are 2 ohms. What is the total resistance?
1 ohm
300
When a current of 3 amperes is run through the coiled heating element of a stove, the resistance of the element is 80 ohms. What is the voltage of the stove?
240 volts
300
What are the units of measure for resistance, current, and voltage?
V (V)
I (Ampere)
R (Ω)
300
What will definitely be the same no matter the color?
Voltage, Current, Resistance?
Voltage
300
A series circuit has 5 resistors: 3 ohms, 10 ohms, 6 ohms, 10 ohms and 3 ohms. What is the total resistance?
32 ohms
400
A walkman uses a standard 1.5 V battery. How much resistance is in the circuit if it uses 0.01 amps?
150 ohms
400
Which lab tool is used to measure the electric current flowing through a circuit?
Ammeter
400
DOUBLE JEOPARDY: As the length of a wire increases, what happens to the resistance?
The resistance increases
400
A parallel circuit has three resistors: 2 ohms, 5 ohms and 10 ohms. What is the total resistance?
1.25 ohms
500
A frying pan is connected to a 110-volt circuit. If the resistance of the frying pan is 10 ohms, how many amperes does the frying pan draw?
11 amps
500
DOUBLE JEOPARDY!
What is the total current of this circuit?
11 amps
500
What is a fuse?
A device that prevents a circuit from overheating and causing a fire. Contains a piece of metal that bends when the current in it is too large.
500
A parallel circuit has 5 resistors: 2 ohms, 10 ohms, 6 ohms, 12 ohms and 3 ohms. What is the total resistance?
0.845 ohms