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Waves, Light, Sounds, Electricity, and Magnetism 101 Flashcards | StudBud
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Waves, Light, Sounds, Electricity, and Magnetism 101
Waves, Light, Sounds, Electricity, and Magnetism 101
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Waves, Light, Sounds, Electricity, and Magnetism 101
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40 cards
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Answers
1
A photon is a small package of energy that makes up light. Photons are found in...
Electromagnetic Waves
Ocean Waves
Sound Waves
2
Which SI unit measures electrical current?
newton
volt
ampere
kilowatt
3
Sonar works by —
B
A
C
D
4
Magnetic force ―
both attracts and repels.
is a force of attraction.
is a force of repulsion.
is exerted by all metal objects.
5
In this sound wave, what are the correct labels for areas X and Z?
X = crest, Z = trough
X = compression, Z = rarefaction
X = rarefaction, Z = compression
X = trough, Z = crest
6
Where is the magnetic force that is exerted by a magnet the strongest?
at the south pole
at the north pole
in the center
at both poles
7
Sounds CANNOT travel through which of the following?
plasmas
gases and liquids
liquids and solids
empty space
8
What happens to magnetic force as the distance between two magnetic poles
decreases
?
It stays the same.
It decreases.
It depends on the circumstances.
It increases.
9
Which material is the best conductor for electricity?
ceramic
metal
rubber
glass
10
Which of these mediums lets sound travel the fastest?
water
aluminum
cork
air
11
The interactions of waves that meet at the same point at the same time is called
refraction
interference
diffraction
reflection
12
Which is NOT an example of
resonance
?
turning on your computer
guitar string vibrations
“hearing the sea” when you put a seashell up to your ear
an opera singer shattering a glass with her voice
13
In the diagram below, what is the arrow pointing to?
a wire
a battery
a resistor
a switch
14
Which is an example of a
compression
wave?
radio wave
sound wave
light wave
heat wave
15
Which of the following occurs as the source of a sound moves
away from
the observer?
velocity of sound decreases
loudness of sound increases
frequency of sound increases
frequency of sound decreases
16
When one object vibrates at a certain frequency and causes a 2nd object to vibrate this is...
harmonics
amplitude
resonance
frequency
17
Which material can be used as an insulator?
silver
copper
steel
plastic
18
The number of waves per second is called the wave...
position
speed
count
frequency
19
If you are walking towards a wave source, how will the waves you encounter change? You will...
encounter waves less often than the source is producing them
encounter waves more often than the source is producing them
encounter waves at the same rate as the source produces them
not encounter any more waves from the source
20
Which path do the light rays follow as they pass through the lens?
go straight through
diverge and spread apart
separate into two sections and then diverge
converge and come to a point
21
If you want to see a wider image of something what should you use?
a convex mirror
a concave mirror
a concave lens
a convex lens
22
Which of the following is an open circuit?
A
B
C
D
23
In a transverse wave distance between the line of origin and the crest is a wave's...
frequency
height
wavelength
amplitude
24
If a shirt reflects all colors, what color is the shirt?
the opposite color as the light shining on it
black
white
the same color as the light shining on it
25
A resistor provides resistance in a circuit. If you use two what will the total resistance do?
The total resistance will decrease
The total resistance will increase
The total resistance will be zero
The total resistance will stay the same
26
Which form of
sound technology
allows medical specialists to get a “picture” inside the body?
sonar
x-ray
laser
ultrasound
27
Which of the following is the unit for measuring intensity of sounds?
ampere
decibel
joule
coulomb
28
The top of a transverse wave is called the...
trough
frequency
node
crest
29
In this circuit what would happen to bulb #1 is light bulb #2 burned out?
It would explode
It would shut off the power source
It would keep burning
It would burn out
30
The law of reflections states: "The angle of incidence is equal to the angle of...
refraction
interference
reflection
diffraction
31
Which path do the light rays follow as they pass through the lens?
Bend outwards
Converge and form a point
Go straight through
Diverge and spread apart
32
What is the cause of sound production in musical instruments?
resonance
wind
harmony
magnitude
33
What two things affect the speed of sound?
the distance to the medium and the size of the wave
the medium and the temperature of the medium
the compression and rarefaction of the sound waves
the temperature and the resonance of the medium
34
A coil of wires that generates a magnetic field when a current is passed through it is a...
magnetic circuit
electron magnet
electromagnet
circuit protector
35
What do like-poles of magnets do?
repel each other
cancel each other’s magnetic field
attract each other
point to Earth’s North Pole
36
The lowest point of a transverse wave is called the...
valley
dip
trough
bottom
37
The long the string of an instrument, the... (think about your straw kazoos)
lower the pitch
quieter the sound
louder the sound
higher the pitch
38
An electric current, flowing in a wire, generates what type of field?
an attraction field
an electrical field
a magnetic field
a gravitational field
39
Two difference sound waves arrive at the same place. What is the resulting wave like?
The same as the first wave
Stronger and louder because of the constructive interference
The same as the second wave
Destructive interference causes these waves to cancel out
40
What optical device bends light inward?
convex lens
convex mirror
plane mirror
concave lens
