* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Welcome to Faraday`s Electromagnetic Lab! To begin, search
Maxwell's equations wikipedia , lookup
History of electrochemistry wikipedia , lookup
History of electromagnetic theory wikipedia , lookup
Electricity wikipedia , lookup
Ground loop (electricity) wikipedia , lookup
Electric machine wikipedia , lookup
Neutron magnetic moment wikipedia , lookup
Electromagnetism wikipedia , lookup
Magnetic nanoparticles wikipedia , lookup
Friction-plate electromagnetic couplings wikipedia , lookup
Magnetic monopole wikipedia , lookup
Magnetic field wikipedia , lookup
Electromotive force wikipedia , lookup
Hall effect wikipedia , lookup
Magnetic core wikipedia , lookup
Multiferroics wikipedia , lookup
Superconductivity wikipedia , lookup
Magnetoreception wikipedia , lookup
Galvanometer wikipedia , lookup
Magnetohydrodynamics wikipedia , lookup
Lorentz force wikipedia , lookup
Magnetochemistry wikipedia , lookup
Superconducting magnet wikipedia , lookup
Scanning SQUID microscope wikipedia , lookup
Electromagnet wikipedia , lookup
Force between magnets wikipedia , lookup
Eddy current wikipedia , lookup
Welcome to Faraday’s Electromagnetic Lab! To begin, search “Electromagnetic Lab” in Google, and click on the first link. Then click “Run Now!” or “Download” to open the simulation. Once you are in the simulation, click on the “Pickup Coil” tab above. You should see the screen shown to the right. Take a minute to familiarize yourself with the controls and parts of the simulation, and then begin the following activity. 1) By manipulating (moving, altering, etc) the loop of wire or the magnet, come up with six different ways that an electric current can be induced in the coil. List them below. See Mr. B for a hint if you’re stuck! 2) In general, what must be happening for there to be a current induced in the wire? Be specific! Some thought and discussion is required for this one! 3) Explain how your answer for question 2 is consistent with each of the six ways that you induced a current in the loop of wire. When a current is induced in a loop of wire, there is also an induced magnetic field associated with this induced current. This second field is not shown in the simulation. In order to quickly and easily determine the direction of the induced magnetic field, you can use RHR #3! RHR #3 If you wrap your fingers around along the way that the induced current flows, your thumb will point in the direction of the induced magnetic field inside the loop! thumb shows direction of Binduced within loop! Example fingers wrap like Iinduced Evilness Warning! In the simulation, the blue circles represent electrons. The direction of the induced current is opposite to the way that the electrons flow! Take a few minutes to practice RHR #3 below. The induced current is shown in the first three (although the reason for the induced current is not shown in the first three). Show the direction of the induced magnetic field within each loop of wire. 1) 2) 3) 4) Show Iinduced and Binduced 5) Show Iinduced and Binduced 6) Show Iinduced and Binduced Now...to decode Lenz’s Law!!! By moving the North/South end of the magnet in/out of the loop of wire in the simulation and recording your observations below, you will be able to determine the relationship between the change in magnetic flux through the loop, and the induced magnetic field in the loop. Whoa. Trial #1: Moving the North end of the magnet toward the loop of wire. Draw the bar magnet’s magnetic field and velocity vector In which direction is the magnetic flux through the loop? Show which way the induced current flows in the loop (remember the evilness warning...) Trial #2: Moving the North end of the magnet away from the loop of wire. Draw the bar magnet’s magnetic field and velocity vector In which direction is the magnetic flux through the loop? Show which way the induced current flows in the loop (remember the evilness warning...) Trial #3: Moving the South end of the magnet toward the loop of wire. Draw the bar magnet’s magnetic field and velocity vector In which direction is the magnetic flux through the loop? Show which way the induced current flows in the loop (remember the evilness warning...) Trial #4: Moving the South end of the magnet away from the loop of wire. Draw the bar magnet’s magnetic field and velocity vector In which direction is the magnetic flux through the loop? Show which way the induced current flows in the loop (remember the evilness warning...) Grand Finale! By taking a step back and looking at the four scenarios that you just analyzed, determine the pattern between the change in the magnetic flux through the loop and the direction of the induced magnetic field in the loop. This will require some thought/discussion. Bonus if you make the discovery! (Check with Mr. B!) What is the relationship between the change in the magnetic flux and the induced magnetic field? Congratulations! You have successfully discovered Lenz’s Law! You rock!