Due: see webpage for due date
How to get credit for this activity
First, sign-in at the computer and sign-out when the activity is complete. Show your work and results to a PLC tutor so they can check your work and initial the signoff sheet. Be prepared to answer questions about the activity or your results.
The figure shows four different circular loops that are perpendicular to the page. The radius of loops
3 and 4 is twice that of loops 1 and 2. The magnetic field is the same for each. Rank in order the magnetic fluxes
, from the largest to the smallest. Some may be equal. Explain
The magnetic flux passing through a coil of wire varies as shown in the graph. During which time interval(s) will an induced current be present in the coil? Explain.
There is a counterclockwise induced current in the conducting loop. Is the magnetic field inside the loop increasing in strength, decreasing in strength, or steady?
The power lines that run through your neighborhood carry alternating currents that reverse direction 120 times per second. As the current changes, so does the magnetic field around a line. Suppose you wanted to put a loop of wire up near the power line to extract power by "tapping" the magnetic field. Sketch a picture of how you would orient the coil of wire next to a power line to develop the maximum emf in the coil. (Note that this is dangerous and illegal, and not something you should try.)