8P3.5 Resistance yr8
Presentation
•
Physics
•
8th Grade
•
Practice Problem
•
Easy
Caroline Andrew
Used 1+ times
FREE Resource
2 Slides • 16 Questions
1
By Caroline Andrew
2
In the resistance of dough investigation...
•What was the independent variable (the thing that you changed)?
•What was the dependent variable (the thing that you measured)?
•What was an important control variable (something you should have kept the same)?
Subject | Subject
Some text here about the topic of discussion
3
Multiple Choice
What was the independent variable in the resistance of dough investigation?
The resistance
The length of the dough
The thickness of the dough
4
Multiple Choice
What was the dependent variable in the resistance of dough investigation?
The resistance
The length of the dough
The thickness of the dough
5
Multiple Choice
What was an important control variable in the resistance of dough investigation?
The resistance
The length of the dough
The thickness of the dough
6
Open Ended
What is an electric current,?
7
Multiple Choice
What is the unit for measuring current?
Volts, V
Ohms, Ω
Seconds ,s
Amps, A
8
Open Ended
What do you need for an electric current to flow?
9
Open Ended
Name some materials with a low resistance
10
Open Ended
Name some materials with a high resistance
11
Poll
If the potential difference is constant, which circuit will have the greater current?
Circuit with low resistance
Circuit with high resistance
12
Poll
If the potential difference is constant and the resistance increases, what happens to current?
Increases
Decreases
Stays the same
13
Poll
If you want to keep the same current when the resistance increases, what must happen to the potential difference?
Increase
Decreases
Stay the same
14
Multiple Choice
Which of these is Ohm's law?
Resistance = potential difference x current
Current = Potential difference x resistance
Potential difference = current x resistance
15
Multiple Choice
Which of these is Ohm's law?
V = I x R
V = I ÷ R
R = V x I
I = V x R
16
Open Ended
A current of 3 A flows through a 6 Ω resistor.
Calculate the potential difference across the resistor.
17
Open Ended
A bulb with 50 Ω resistance has a 0.2A current flowing through it.
Calculate the potential difference across the bulb.
18
Open Ended
Calculate the resistance of a fan if a 6 V potential difference causes a 0.5 amp current to flow through it.
By Caroline Andrew
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