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Electricity and Magnetism Flashcards | StudBud
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Electricity and Magnetism
Electricity and Magnetism
20 terms
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Quiz bowl review in Physics over Electricity and Magnetism.
Flashcards
20 cards
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Practice quiz
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Questions
20
Answers
1
Every proton in the universe is surrounded by its own
none of the above
both A and B
gravitational field.
electric field.
2
What are three ways an object can become charged include:
induction, conduction, and friction
induction, conduction, and magnetism
deduction, conduction, and friction
induction, convection, and friction
3
If you comb your hair and the comb becomes positively charged, your hair becomes
positively charged
uncharged
negatively charged
4
What charge is associated with 100 electrons?
-1.6 x 10-17 C
1.6 x 10-17 C
-1.6 x 10-19 C
1.6 x 10-19 C
5
The direction of electric field lines shows the
direction of the force on a test positive charge.
size of the field.
strength of the field.
all of the above
6
When an 8V battery is connected to a resistor, 2 A current flows. What is the resistance?
16 ohms
8 ohms
4 ohms
2 ohms
7
How does a metal scrap yard use an electromagnet to pick up large objects like cars?
Induction
Generators that do mechanical work
Very high voltages
Large rare-earth magnets
8
The similarities between Coulomb's law and Newton's law of gravitation include all EXCEPT:
constants determined experimentally
inverse-square law
directly proportional to charge/mass
Forces are only attractive
9
An example of a voltage source is
a generator.
a car battery.
all of the above
a dry cell.
10
The differences between Coulomb's law and Newton's law of gravitation include all EXCEPT:
Electrical forces may be repulsive
Electrical forces are much greater than Gravitational forces
Electrical forces may be shielded.
Fields of force are created by similar subatomic particles
11
Where do the electrons come from that produce heat and light in a light bulb?
the air
the wall plug
the bulb's wire filament
the power company
12
Electrical resistance in a wire depends on the wire's
all of the above
length.
conductivity.
thickness.
13
When a charged cloud passes overhead, the ground below is charged by
electrification.
induction
polarization.
deduction.
14
To say that electric charge is conserved means that no case has ever been found where
the total amount of charge on an object has increased.
one object has more charge than another object.
the total charge on an object has changed.
net charge has been created or destroyed.
15
Electric fields outside a Van de Graaff generator are enormous, inside the dome, the field is
almost as enormous.
zero.
even more enormous.
16
In which direction does the electric field point when the test charge is negative?
Away from the positively charged body
Toward a positively charged body
Perpendicular to a positively charged body
Parallel to a positively charged body
17
In order for there to be a flow of charge from one place to another, there must be a
conductor, such as a wire, connecting the two places.
Both A and B above
potential difference between the two places.
18
Charge carriers in a metal are electrons rather than protons, because electrons are
all of the above
relatively far from a nucleus.
lighter.
loosely bound.
19
What is the current in a 60 W bulb connected to a 120 V source?
0.25 A
4 A
2 A
0.5 A
20
Electrical polarization occurs when
an atom vibrates in a single direction.
the electron and the proton are on different sides
an electron is at a different location than a proton.
charge distribution in a neutral molecule separates.
