WorksheetsFinal Exams Review (2nd Semester)
Total questions: 59
Worksheet time: 1hrs 4mins
Name
Class
Date
1.
Two like charges
a)
neutralize each other.
b)
repel each other.
c)
must be neutrons.
d)
attract each other.
2.
The charge of an electron is
a)
positive.
b)
negative.
c)
Electrons have no charge
3.
An atom loses an electron. What type of charge does it have now?
a)
positive
b)
negative
4.
An atom gains an electron. What type of charge does it have now?
a)
positive
b)
negative
c)
No charge
5.
When a balloon is rubbed on clothes it acquires a charge by ___________
a)
Induction
b)
reduction
c)
friction
d)
concuction
6.
If after you rub a balloon on your hair the balloon has a negative charge, what charge does your hair have?
a)
Positive
b)
Negative
c)
Neutral
7.
What do you call the process of charging a conductor by bringing it near another charged object?
a)
induction
b)
polarization
c)
neutralization
d)
conduction
8.
What direction are the electric field lines around a proton?
a)
towards the charge
b)
away from the charge
9.
The law of conservation of charge states that...
a)
all atoms have more protons than electrons
b)
only protons can be rubbed off of an atom
c)
charge cannot be created or destroyed
d)
charge cannot be transferred
10.
Which of the following is not a good insulator?
a)
Copper
b)
Glass
c)
rubber
d)
wool
11.
Which of the following is not a good conductor of electricity?
a)
copper
b)
silver
c)
Glass
d)
aluminum
12.
Which of the following labeled points is in the region with the strongest force of electric charge
a)
A
b)
B
c)
C
d)
D
13.
What is the unit of electric charge?
a)
Volt
b)
Amp
c)
Coulomb
d)
Ohm
14.
If you double the distance away from a charged particle, the total electric field of that particle:
a)
is 1/2.
b)
is 1/4.
c)
is doubled.
d)
stays the same.
15.
What variables affect the magnitude of the electric force between two objects with charge?
a)
charge of the first object
b)
charge of the second object
c)
distance between the charges
d)
all of the answers
16.
How is the electric force between two charges affected when the distance between the charges is doubled?
a)
Four times as much.
b)
Two times as much.
c)
Half as much.
d)
One-quarter as much.
17.
If the charge is tripled for each of two identical charges maintained at a constant separation, the electric force between them will be changed by what factor?
a)
3
b)
9
c)
1/3
d)
1/9
18.
A material in which electrons are able to move easily.
a)
Circuit
b)
Insulator
c)
Resistance
d)
Conductor
19.
If a 75 W light bulb operates at a voltage of 120 V, what is the current in the bulb?
a)
0.63 A
b)
1.6 A
c)
9.0 x 103 A
d)
1.1 x 10-4 A
20.
Three resistors with values of 4.0 Ω, 6.0 Ω and 8.0 Ω respectively, are connected in series. What is their equivalent resistance?
a)
18
b)
8.0
c)
6.0
d)
1.8
21.
Three resistors connected in series carry currents labeled I1, I2 and I3 respectively.
Which of the following expresses the total current, It, in the system made up of the three resistors in series?
Which of the following expresses the total current, It, in the system made up of the three resistors in series?
a)
It =I 1 + I2 + I3
b)
It = (1I1 + 1/I2 + 1/I3
c)
It = I1 = I2 = I3
d)
It = (1I1 + 1/I2 + 1/I3)-1
22.
Three resistors with values of 4.0 Ω, 6.0 Ω and 10.0 Ω are connected in parallel. What is their equivalent resistance?
a)
20.0 Ω
b)
7.3 Ω
c)
6.0 Ω
d)
1.9 Ω
23.
The current flowing in an electric circuit can be increased by:
a)
increasing voltage or decreasing resistance.
b)
decreasing voltage or increasing resistance.
c)
increasing voltage and increasing resistance.
d)
decreasing voltage and decreasing resistance.
24.
When one bulb in a series circuit containing several light bulbs burn out:
a)
the other bulbs burn brighter.
b)
nothing changes in the rest of the circuit.
c)
none of the other bulbs will light up.
25.
When resistors are put in parallel with each other their overall resistance is:
a)
larger than that of any other resistor.
b)
the same as the resistance of one of the resistors.
c)
smaller than the resistance of any of the resistors.
26.
A flashlight bulb is rated at 0.90 W. If the electric potential drop across the light bulb is 3.0 V, how much current goes through it?
a)
30 A
b)
3.3 A
c)
2.7 A
d)
0.3 A
27.
Potential difference is measured in:
a)
ohms
b)
ampere
c)
watts
d)
volts
28.
Resistance is measured in:
a)
joules
b)
ohms
c)
amperes
d)
watts
29.
Energy is measured in:
a)
joules
b)
ohms
c)
amperes
d)
watts
30.
Current is measured in:
a)
joules
b)
ohms
c)
amperes
d)
watts
31.
Power is measured in:
a)
joules
b)
ohms
c)
amperes
d)
watts
32.
The current going through the battery of this circuit is
a)
0.35 amps
b)
0.0286 amps
c)
0 amps
d)
9 amps
33.
The voltage drop across the 180 ohm resistor is
a)
9 V
b)
6 V
c)
2 V
d)
12 V
34.
This is an example of a _______ circuit
a)
open
b)
series
c)
parallel
d)
square
35.
The equivalent resistance in this circuit is
a)
100 ohms
b)
450 ohms
c)
400 ohms
d)
30 ohms
36.
The current through the battery of this circuit is
a)
0.02 amps
b)
0.09 amps
c)
50 amps
d)
9 amps
37.
The voltage dropped across the 300 ohm resistor is
a)
6 V
b)
9 V
c)
2 V
d)
30 V
38.
Which of the following are ferromagnetic materials?
a)
iron
b)
cobalt
c)
nickel
d)
ALL OF THESE
39.
What will happen if two opposite poles of magnets are placed together?
a)
They will repel each other.
b)
They will attract to each other.
40.
The strongest part of a magnet is...
a)
the bars.
b)
the force field.
c)
the poles.
d)
the middle.
41.
This is an example of...
a)
attraction
b)
repulsion
42.
If you wrap more coils around an electromagnet, it will become...
a)
brighter
b)
stronger
c)
weaker
d)
invisible
43.
A device that increases or decreases the voltage of alternating current
a)
A. magnet
b)
B. magnetic pole
c)
C. transformer
d)
D. magnetic force
44.
The attraction or repulsion created by spinning electric charges
a)
A. electric generator
b)
B. magnetic force
c)
C. solenoid
d)
D. electromagnet
45.
A device that converts electrical energy into mechanical energy
a)
A. electromagnet
b)
B. electromagnetic induction
c)
C. electric motor
d)
D. electromagnetism
46.
The process of creating a current in a circuit by changing a magnetic field
a)
A. electric generator
b)
B. electric motor
c)
C. electromagnetic induction
d)
D. magnet
47.
A device that converts mechanical energy into electrical energy
a)
A. electric generator
b)
B. electric motor
c)
C. electromagnetic induction
d)
D. electric generator
48.
What is created when a wire moves between the poles of a magnet?
a)
A. a ferromagnet
b)
B. a solenoid
c)
C. an electromagnet
d)
D. an electric current
49.
Which of the following are two effects of Earth’s magnetic field?
a)
A. compass points to geographic north, auroras seen at both poles
b)
B. compass points to magnetic north, auroras seen at both poles
c)
C. compass points to geographic south, auroras seen at the equator
d)
D. compass points to geographic north, auroras seen at the equator
50.
What can you make visible by sprinkling iron filings around a magnet?
a)
A. the areas called domains
b)
B. the magnetic forces
c)
C. the north and south poles
d)
D. the magnetic field lines
51.
A substance that a wave can travel through like water, air and a slinky.
a)
Crest
b)
Water
c)
Large
d)
Medium
52.
A disturbance or vibration that carries energy from one place to another.
a)
Mechanical
b)
Crest
c)
Wave speed
d)
Wave
53.
A wave in which energy put into the wave moves in the same direction as the wave.
a)
Longitudinal Wave
b)
Transverse Wave
54.
The number of waves that pass in a certain amount of time is called....
a)
Frequency
b)
Wave length
c)
Amplitude
d)
Crest
55.
When you talk, you are making a mechanical wave.
a)
True
b)
False
56.
The height of a wave from its rest position to the top of the wave is called....
a)
Crest
b)
Wavelength
c)
Frequency
d)
Amplitude
57.
If the frequency of the wave gets higher the wavelength of the waves gets.....
a)
longer
b)
higher
c)
shorter
d)
faster
58.
The bending of a wave as the wave passes between two substances in which the speed of the wave differs
a)
A. refraction
b)
B. reflection
c)
C. resonance
d)
D. standing wave
59.
Can you hear sounds in a vacuum?
a)
Yes
b)
No
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