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Physical Science - Electricity and Magnetism Flashcards | StudBud
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Physical Science - Electricity and Magnetism
Physical Science - Electricity and Magnetism
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Quiz bowl review for final unit on EM in 8th grade Physical Science
Flashcards
16 cards
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Practice quiz
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Questions
16
Answers
1
After you rub a balloon on your hair, the balloon will likely be charged
to several hundred volts.
to less than 10 volts.
not at all.
to several thousand volts.
2
Charge carriers in a metal are electrons rather than protons, because electrons are
loosely bound.
lighter.
relatively far from a nucleus.
all of the above
3
What does Ohm's Law state?
Voltage equals current times resistance
Current equals voltage times resistance
Voltage equals current divided by resistance
Voltage equals resistance divided by current
4
Where do the electrons come from that produce heat and light in a light bulb?
the air
the power company
the bulb's wire filament
the wall plug
5
An example of a voltage source is
all of the above
a car battery.
a dry cell.
a generator.
6
What are three ways an object can become charged include:
induction, conduction, and magnetism
induction, conduction, and friction
induction, convection, and friction
deduction, conduction, and friction
7
Electric fields outside a Van de Graaff generator are enormous, inside the dome, the field is
almost as enormous.
zero.
even more enormous.
8
The direction of electric field lines shows the
size of the field.
strength of the field.
all of the above
direction of the force on a positive test charge.
9
In order for there to be a flow of charge from one place to another, there must be a
Both A and B above
conductor, such as a wire, connecting the two places.
potential difference between the two places.
10
To say that electric charge is conserved means that no case has ever been found where
one object has more charge than another object.
net charge has been created or destroyed.
the total amount of charge on an object has increased.
the total charge on an object has changed.
11
When an 8V battery is connected to a resistor, 2 A current flows. What is the resistance?
8 ohms
2 ohms
16 ohms
4 ohms
12
Electrical resistance in a wire depends on the wire's
thickness.
conductivity.
length.
all of the above
13
If you comb your hair and the comb becomes positively charged, your hair becomes
negatively charged
positively charged
uncharged
14
Electromagnetic waves are produced by
Earth’s magnetic field.
the vibration of iron filings.
the vibration of an electric field and a magnetic field together.
static electricity.
15
Every proton in the universe is surrounded by its own
gravitational field.
electric field.
none of the above
both A and B
16
When a charged cloud passes overhead, the ground below is charged by
polarization.
induction
electrification.
deduction.
