

OHM'S LAW SERIES AND PARALLEL CIRCUIT
Presentation
•
Science
•
10th Grade
•
Medium
Brian Chua
Used 6+ times
FREE Resource
8 Slides • 20 Questions
1
by Brian Chua
2
Multiple Select
1
Ohm's Law describes how Voltage, Current, and Resistance are related by the equation I = V/R. Which equation would help us find resistance?
R = V x I
R = V / I
R = I / V
3
Multiple Choice
What is resistance measured in?
Ω (Ohms)
A (Amps)
V (Volts)
W (Watts)
4
Multiple Choice
Ohm's Law describes how Voltage, Current, and Resistance are related by the equation I = V/R. Which equation would help us find voltage?
V = I x R
V = R / I
V = I / R
5
Multiple Choice
As the resistance of a circuit increases, the current will...
increase
stay the same
decrease
6
Multiple Choice
What is the Voltage of a circuit that has a resistance of 5 Ω and a current of 2 A?
25 V
2.5 V
10 V
0.4 V
7
2 Basic Types of Circuits:
Series (one path for electrons)
Parallel (more than one path for electrons to flow)
8
Multiple Choice
What kind of circuit is this?
series
parallel
9
Multiple Choice
The picture shows an electrical circuit. This circuit is a series circuit because:
It has 3 light bulbs.
It uses a single battery.
The same current flows through all three light bulbs.
The electrical current has more than one path to flow through
10
The voltage drops each time it passes through a resistor (like a lightbulb)
Total voltage equals the sum of all the voltage drops.
V total = V1 + V2 + V3 + V4 ...
Total Voltage also equals the voltages of all batteries placed in series
11
Multiple Choice
What is the total voltage of the battery if its 5 resistors produce the follwoing drops: 8V, 2V, 5V, 1.5V and 1.5V?
4.5 V.
18 V.
9 V.
36 V.
12
The voltage is the same no matter which branch of the parallel circuit you're on.
VTotal = V1 = V2 = V3 = ...
Like a platform with several water slides (paths down), no matter which one you choose, everyone ends back up at the bottom.
13
Multiple Choice
The following type of circuit has the same voltage throughout the entire circuit.
series
parallel
14
The same current is shared by the whole circuit, since there's only one path for the electrons to go, so all the electrons go that way
ITotal = I1 = I2 = I3 = I4 = I5 = ...
15
In parallel, the electrons will split and go down different paths, so only some will go down any given path
This decreases the current through each path.
Current will be faster where there's less resistance.
Electrons regroup at the end, though, so... IT = I1 + I2 + I3 + ...
16
Multiple Choice
What is current?
the amount of push the electrical source supplies to the circuit
flow of electric charge
how much a given device resists the flow of electric current
none of the above
17
Multiple Choice
The current is the same throughout this type of circuit
series
parallel
18
Multiple Choice
A parallel circuit has 6 ohms, 10 ohms, 12 ohm and 15-ohm resistors. Which resistor will have the highest amount of current flowing through it?
15
10
12
6
19
The more resistors you add, the more resistance overall.
Adding more lightbulbs to this circuit would make each bulb dimmer and dimmer.
RTotal = R1 + R2 + R3 + R4 ...
20
Multiple Choice
If we added a 4th lightbulb...
the bulbs would get brighter
the bulbs would all get dimmer
the bulbs would turn off
the bulbs would each have a different brightness
21
Multiple Choice
What is the total resistance of a series circuit with values of 5, 9, and 17 ohms?
31
17
765
3
22
Multiple Choice
What is the current of a series circuit with values of 5, 9, 17 ohms, with a battery of 12V
0.3871
372.0
3870.0
4.4395
23
Total resistance decreases the more resistors you add in parallel
It's like on Black Friday when the checkout line gets long and they add another checkout. There won't be as many people going through each line, but each person won't have the line holding them back as much.
1/RT = 1/R1 + 1/R2 + 1/R3 ...
24
Multiple Choice
Three resistors,RA=10 Ω , RB =20 Ω , and RC = 25 Ω , are connected in PARALLEL. The total resistance of this setup is equal to _____.
0.19 Ω
18.33 Ω
5.26 Ω
55 Ω
25
Multiple Choice
Three resistors, RA=10 Ω , RB =20 Ω , and RC = 25 Ω , are connected in PARALLEL. The total resistance of this setup is equal to _____.
0.19 Ω
18.33 Ω
5.26 Ω
55 Ω
26
Multiple Choice
The current going through the 90 ohm resistor is
10 amps
0.2 amps
0.1 amps
.06 amps
27
Multiple Choice
The total resistance in this type of circuit is always smaller than any of its single resistor.
series
parallel
28
Multiple Choice
In a parallel circuit, when one light goes out, the others stay on. Now that there are less paths for the electrons, is there more or less total resistance?
more (more backed up electrons, since there are less options for them to go)
less
the same
by Brian Chua
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