## Saturday, March 21, 2015

### EM Induction Check List

Check out the check list:

EM Induction Check List
-          Can you define magnetic flux?
-          Can you define induction (in general)?
-          Can you define emf?
-          Do you know what Faraday’s law is mathematically?
-          Do you know the two main ways of changing magnetic flux?
-          Do you know why the – sign is placed in Faraday’s law?
-          Can you state Lenz’s law?
-          Can you apply Lenz’s law for increasing flux? Decreasing flux?
-          Do you know what happens to a conducting rod moving in a B-field?
-          Can you find the E-field strength in a moving conducting rod in a B-field?
-          Can you explain why a current turns on when the area is changing (i.e. the loop/circuit is moving)?
-          Can you explain why a current turns on when a B-field is changing (i.e. dB/dt)?
-          Can you find emf, current, IL x B forces, v(t), power, and heat energy when the loop/circuit is moving and the area is changing?
-          Can you find emf, current, IL x B forces, power, heat energy, and the induced circulating E-field when there is dB/dt?
-          Do you know what an inductor is?
-          Do you know what an inductor does in a circuit? And why?
-          Do you know how to find the energy stored in an inductor?
-          Can you derive i(t) in a series LR circuit?
-          Can you figure out the currents in a LR circuit when L and R are in parallel?
-          Do you know what happens when there is a LC circuit?
-          Can you determine a solution for q(t), i(t), di/dt in a LC circuit?
-          Can you find the frequency of oscillation of current in a LC circuit?
-          Can you explain, at least qualitatively, what resistance does in a LRC circuit, compared to an ideal LC circuit?
-          Can you explain the gist of how a radio works (or wireless technology in general), in terms of LC circuits?
-          Can you explain what the Maxwell displacement current is?
-          Do you know what the four Maxwell equations are?
-          Can you qualitatively explain how you can create an electromagnetic wave?
-          Do you know what a transformer is, and how it works?
-          Can you explain how various contraptions work in terms of em induction (think of all the devices in our lab)?