Chapter 16 & 17
Chapter 19
Chapter 20 & 21
Chapter 22, 23, 24
Miscellaneous
100
A certain transformer turns 120 volts into 12 volts. If the primary coil has 260 coils how many should the secondary coil have?
26 Turns
100
Give 3 examples of an oscillator
More than 3 answers
100
What causes waves?
Vibrations
100
What kind of waves have the property of polarization and what is it.
Transverse waves. Polarization is letting 1 of the directions of a perpendicular wave pass and blocking the other one.
100
What is the name of 1 nuclear powerplant? What percentage of energy do nuclear powerplants generate in the US? What process do nuclear powerplants use to generate energy?
Fermi 2 and nuclear power plants generate 20% of power to the US using nuclear fission
200
If you reverse the current in a coil, what happens to the magnetic field? Explain why using the right-hand rule.
If you reverse the current the magnetic field and poles also reverse.
200
After being struck an oscillating object was loud at first but then gradually became quieter until it stops. What is this physical process called?
Damping
200
Give 2 examples of transverse and longitudinal each
Possible answers
Transverse: Light waves and water surface waves and electromagnetic waves
Longitudinal: Sound waves and slinky compressions
200
A light shines with an intensity of 100 candela (unit for luminous intensity) at a distance of 5 meters. What is the intensity at a distance of 10 meters?
25 Candella
200
What are the major differences between parallel and series circuits?
Series only has 1 path for current, parallel has many. Voltage is split among devices in series while in parallel its always the same. Current in series circuit is always the same, in parallel it splits across all branches.
300
What are the 3 essential parts of a motor?
The 3 essential parts of a motor are: some sort of magnet either permanent or electromagnet, a rotor and a commutator.
300
A wave has a frequency of 5.5 Hz and a wavelength of 10 meters. What is its speed?
55 m/s
300
What is a standing wave and what are the points on it called
A stationary wave and the points are either nodes or antinodes.
300
When we look at ourselves in the mirror why do we see ourselves more clearly than if we look at a wall although they both reflect light?
A mirror uses specular reflections which happens on shiny smooth surfaces giving a clear image unlike the wall which uses diffuse reflection which gives unclear images.
300
What are 2 ways you can charge an object?
Charging by friction or by induction.
400
What is a Solenoid? Give an example of how they are used.
A solenoid is a coil of wire wrapped in order to produce magnetic field when current goes through it. MRI machines use solenoids to create strong magnetic fields used for imaging bodies.
400
Why does increasing the amplitude of a wave increase its energy, but not its speed?
Because energy is directly proportional to the amplitude not speed. (Tsunamis)
400
What are the 4 interactions of waves? Give an example of each.
Reflection: Mirror, absorption: Curtains in movie theater, refraction: Straw in water glass, and diffraction: Sound from a music band moving around a school from the back to the front.
400
What is the speed of all electromagnetic waves in miles per second
Approximately 185,000 miles per second
400
What is transmission in light waves?
Transmission is an interaction of light waves which occurs when light goes through an object without being reflected, absorbed or refracted.
500
What did Faraday discover and Explain his Law of Induction?
Faraday discovered that magnetism can create electricity and his law of induction states that changing magnetic field can induce an electric current in a nearby conductor.
500
How long would it take for 3.5 Cycles to happen
14 seconds
500
Why can't sound travel through a vacuum, while light can?
Sound needs a medium to go through; Light does not
500
Name colors of spectrum by order from greatest to least energy
Violet, Indigo, Blue, Green, Yellow, Orange, Red Remember ROY G BIV
500
Give the units for the following: wavelength, period, frequency, amplitude, wave speed, current, voltage, resistance, power and charge.
wavelength is lambda, period is seconds, frequency is hertz, amplitude can change but usually meters, wave speed is m/s, current is amperes, voltage is volts, resistance is ohms, power is watts, charge is coulombs.