Magnets
Which pole does the magnetic field emerge from?
North pole
Write Faraday's law on the board
Induced voltage = change in flux/change in time
P = 2.83 x 10-4 D2v3 kW
Calculation of wind power
Moving a magnet through ____ creates ____
Moving a magnet through a coil creates electricity
What is the difference between Energy Conservation and Conservation of energy?
Energy Conservation- Desire not to waste energy.
Conservation of Energy- Energy can not be created nor destroyed, only transformed.
The loops around a magnet
What is a magnetic field
It acts as both a wave and a particle
What's a photon
Variables in Wind power equation
radius/diameter
velocity of wind
area
density of air
What can an electric current create?
A magnetic field
A measure of the amount of carbon dioxide and other carbon compounds emitted due to the consumption of fossil fuels by a particular person, group, etc.
What is carbon footprint
The SI unit of Magnetic flux
What is a weber
The way electricity gets generated in PV (photo-voltaic) panels
photovoltaic effect
How to calculate the swept area of a blade
pi*r2
the amount of stuff times the area that it is going through
What is flux
The Equation for the Conservation of Energy
What is PE(Initial) + KE(Initial) = PE(Final) + KE(Final)
A magnet falls slower down in a copper tube slower than a wooden tube because of ____ law
Lenz's law
A chart showing the different waves of light and radiation
What is the Electromagnetic spectrum
True or false: Wind power efficiency is 100%
False
If a coil is moving at a constant speed, Is there a change in flux?
No
Name 3 ways you can save electricity in the dorms.
Turning off lights/devices, not using laundry machines as often, unplugging wires, taking stairs instead of elevator, etc...
Which loop will have a larger magnetic flux? A smaller loop with a stronger magnetic field or a larger loop that has a bigger surface area? (Ignore the velocity)
The larger loop that has a bigger surface area
This junction forms a special semiconductor crystal due to the photovoltaic effect
what is a p-n junction
A builder lives in an area where wind is 5 m/s and has a windmill with blades that are 7 meters in diameter. How much power can they produce from the windmill
6.93 kW
What is the energy transformation described in this image?
Potential energy → kenetic energy → EM energy → electric energy
Name three energy transformations in a coal power plant?
What is Heat, Mechanical, and Electric. Coal is burned to heat up water. Steam from water spins a turbine. The turbine generates electricity by spinning a magnet.