
Science Section II Test p. 3 of 3
Quiz
•
Science
•
9th Grade
•
Practice Problem
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Medium
+3
Standards-aligned
Timothy Chun
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31 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does Ohm’s law state?
I = R/V
V = I/R
I = V/R
R = I/V
V = I + R
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the resistance (R) in Ohm’s law represent?
a quantity that resists the flow of current, like friction
the current flowing through the battery
the voltage in a circuit
the total charge in a battery
the power of the battery
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the example with the fork and a wall outlet, why can a dangerous electric shock happen even though the voltage is only 120 V?
because 120 V is a very high voltage
because the fork is an insulator
because the fork is a good conductor, allowing many charges to flow
because the outlet has a very high resistance
because the fork blocks the current from flowing
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does voltage create in an electric circuit?
the flow of electrons
the amount of resistance
the temperature of the wire
the power of the circuit
the potential difference that allows current to flow
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why does the tungsten filament in an incandescent lightbulb glow?
because it is cooled by the air
because it reflects light from outside
because it contains water that heats up
because current flowing through it heats it up until it glows
all of the above
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of the glass bulb in a lightbulb?
to glow and produce light
to conduct electricity
to protect people from touching the hot tungsten filament
to cool down the filament
to speed up the electrons
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How much energy is equivalent to one kilowatt-hour?
1,000 joules
3,600 joules
36,000 joules
3,600,000 joules
360 joules
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