The electric field induces the flow of electrons, known as
3.3 Knowledge Check
1
Knowledge Check: Part A
The lasers are made from stacking light waves that add together into a larger wave in a process known as ______________.
3 Points
destructive interference
constructive interference
radio interference
gamma ray interference
2
The light waves have that particular interference from questions #1 because they are emitted __________.
3 Points
in phase
out of phase
in perpendicular directions
in thoughtless rage
3
The emission of the light waves in the lasers allows them to overlap properly to create larger waves, which means that _______________________ overlap.
3 Points
the waves do not
the troughs of one wave and the crests of another
identical parts of the two waves
only fifty percent of one wave and another wave
4
The lasers are red, meaning that they are giving off light in the ____________ region of the electromagnetic spectrum.
3 Points
radio wave
microwave
visible light wave
ultraviolet wave
5
The weapon used by the Jawa surrounds R2-D2 with a strong electric field, which is created by a large imbalance of ____________.
3 Points
electrons
chemical bonds
neutrons
the Force
6
The electric field induces the flow of electrons, known as __________________,
3 Points
voltage
electric current
resistance
interference
7
The magnitude of the electric current is directly proportional to the _____________ of the electric field.
3 Points
voltage
electric current
resistance
interference
8
The magnitude of the electric current is inversely proportional to the _______________ of the circuits in R2D2.
3 Points
voltage
electric current
resistance
interference
9
The setting sun is actually visible after it has dropped below the horizon due to the bending of light waves entering the atmosphere at a non-perpendicular angle to the surface, a process known as _______________.
3 Points
reflection
refraction
constructive interference
destrustive interference
10
The Sun is going down, and most of the land is dark, still we can see silhouettes and outlines of objects because some light is still ____________ the atmosphere.
3 Points
absorbed in
reflected by
transmitted through
scattered by
11
Obi Wan uses his Jedi mind tricks to compel people to do his will. The words he uses begin in his vocal cords which _________ the air molecules in his throat.
3 Points
reflect
refract
absorb
vibrate
12
The words that began in his vocal chords are passed in _____________ through the gas medium to convince the troopers.
sound waves
radio waves
microwaves
visible light waves
13
Han and Greedo fire their blasters at each other. The blasts are loud, and the intensity of the sound spreads through the cantina following the ______________.
3 Points
Conservation of Momentum
Inverse Square Law
Ohm’s Law
Newton’s Third Law of Momentum
14
The sound strikes the cantina walls and bounces off at the same angle as it struck in a process known as ______________.
3 Points
reflection
refraction
constructive interference
destructive interference
15
Obi Wan hears the destruction of a planet and all of its people through ‘the force’. These sounds are only in his head and are not carried through space, since space has no ______________ through which sound could transmit.
3 Points
electromagnetic wave
electrons
magnetic field
medium
16
However, had it been a real sound, the sound’s pitch would have been increased by the Doppler Effect, since the Falcon was moving ______________ the source of the sound.
3 Points
perpendicular to
away from
towards
at the same speed as
17
The communications of the ship were made inoperable by electromagnetic waves sent by the Death Star that were completely out of phase with attempted communications causing ______________.
3 Points
reflection
refraction
constructive interference
destructive interference
18
These generators utilize a changing magnetic field through coils of wire to produce ______________ that supplies the tractor beam with electricity.
3 Points
an electric field
a Doppler effect
constructive interference
destructive interference
19
Vader’s light saber is red, while Obi-Wan’s light saber is blue, meaning that Obi-Wan’s light saber is emitting ______________ compared to Vader’s light saber.
3 Points
lower energy light waves
higher energy light waves
the same energy light waves
more sound waves
20
Both red and blue light are in the visible light region of ______________.
3 Points
Ohm’s Law
the Inverse Square Law
the electromagnetic spectrum
Newton’s Third Law of Motion
21
Knowledge Check: Part B
Find a picture from a media source (movies, TV, comics, video games, etc.) that contains a device generating electricity connected to a device that is using electrical energy. Place the picture in the following diagram template and cite the image using APA format:
Keynote: Week3DiagramTemplate.key
PowerPoint: Week3DiagramTemplate.pptx
If you need help learning how to manipulate the template in Keynote checkout this Lynda.com video series . For a different version of Keynote, power point or other software, just search in lynda.com for other great courses.
If you are unable to open either of the diagram templates for any reason, please use the image below as a guideline in creating your own diagram in another presentation-based software program.
Answer the following questions based on the picture chosen and what you have learned this week.
Open your diagram template and do the following:
1. Move and resize the red circle so that it is around an object in your diagram that is producing electricity (electrical energy) and label it in the key.
2. Move and resize the green circle so that it is around the device that is using electrical energy and label it in the key.
0 Points
Done!
Do not choose this option.
22
Current is most closely defined as:
3 Points
The amount of electrical potential energy between two charged points per unit of charge.
A quantity that measures the amount of opposition to electron flow in a circuit.
The rate at which electric charge is flowing through a conductor.
Both A and C.
None of the above.
23
Voltage is most closely defined as:
3 Points
The amount of electrical potential energy between two charged points per unit of charge.
A quantity that measures the amount of opposition to electron flow in a circuit.
The rate at which electrons are flowing around a closed circuit per unit of time.
Both A and C.
None of the above.
24
Resistance is most closely defined as:
3 Points
The amount of electrical potential energy between two charged points per unit of charge.
A quantity that measures the amount of opposition to electron flow in a circuit.
The rate at which electrons are flowing around a closed circuit per unit of time.
Both A and C.
None of the above.
25
The electrical energy from the electric generator is being sent to the device that uses that electrical energy. Does this energy vanish? If not, what happens to this energy after it makes it to the device? (Don’t forget about the Conservation of Energy!)
5 Points
26
If the cable from the electrical generator was looped on the floor producing a coil and turned on what would happen?
3 Points
An electric field would be produced in the center of the coil.
A magnetic field would be produced in the center of the coil.
Light would be produced in the center of the coil.
Nothing would happen.
27
Suppose another device was wired into the circuit next to your current device using electrical energy that you circled in green before. Assuming this second device was wired in series, what would happen to the total current?
3 Points
The current would go up.
The current would go down.
The current stays the same.
28
Open your diagram template and do the following:
1. In order for current to flow, there must be a complete circuit (loop) for the current to flow through. Move, resize, and rotate the yellow arrows to show the full circuit between the generator and the electrical using device that the current is using. You can also copy and paste to make more arrows if needed. (Make your best guess if you are not able to see all the wires.)
2. You will be marking the voltage at two points on your circuit that you have marked with yellow arrows. A orange dot will mark a point with the higher voltage, and a purple dot will mark a point with lower voltage. Place one of the two dots either right before or right after the power generator in your circuit. Place the other dot on your circuit near the device using electric power.
Save your diagram as a PDF and upload the completed file below.
20 Points