A magnetic induction table is a representation that helps you organize and keep track of the various quantities needed for Faraday’s Law. An example table from the video is reproduced below.
Table29.1.3.Example Magnetic Induction Table
Quantity
Direction or Sign
Magnitude
\(\vec{A}\)
Out
\(xy\)
\(\vec{B}\)
out
\(B\)
\(\Phi_B\)
\(+\)
\(Bxy\)
\(\frac{d\Phi_B}{dt}\)
\(-\)
\(Bxv_y\)
\(V_{ind}\)
\(+\)
\(Bxv_y\)
\(I_{ind}\)
\(ccw\)
\(\frac{Bxv_y}{R}\)
ExercisesActivities
The current-carrying wire below is being pulled downward, away from the square metal loop.
Figure29.1.4.A long wire carrying current to the right below a wire loop.
1.
As the wire is moving, is there a clockwise current induced around the loop, a counterclockwise current, or no current? Create a magnetic induction table to explain your reasoning.
2.
Describe a different experiment you could do with the setup in the figure that would result in an induced current in the loop. What direction will the current in the loop be for your experiment, and why?
