u/ScaryEnderman50

For those unaware, the 150% rule states that someone must be able to complete their degree with no more than 150% of the standard credit amount to be considered making satisfactory academic progress. For example, if your degree requires 120 credits, you must complete your degree with no more than 180 credits to be considered making satisfactory academic progress.

As a college junior who is pursuing a triple major, I often take 5 classes a semester (occasionally 6, the standard being 4 per semester), and I also take summer courses. That is to say, there is a high likelihood of me exceeding the 150% threshold by my senior year, making my academic progress considered unsatisfactory despite having a GPA well above 3.5 and not having transferred schools.

Has anyone else been in a similar predicament? If so, were you able to submit an appeal, and was it accepted?

For a circuit with a resistor of resistance R, a capacitor of capacitor C, and a battery with an emf V, we use Kirchhoff’s Loop Rule to write V - q/C - Rdq/dt = 0, from which we can solve charge on the capacitor and current through the resistor as functions of time.

I am not entirely convinced this is allowed. Kirchhoff’s Loop Rule (the directed sum of any potential differences around a closed loop is 0) is just a reformulation of the statement that the line integral of the electric field around any closed loop is 0/that the curl of the electric field is 0. This holds in the electrostatic and magnetostatic cases, but this fails when there exist changing magnetic fields because the curl of the electric field is the negative of the time derivative of the magnetic field. By Stokes’ Law, this is equivalent to the statement that the line integral of the electric field around a closed path is the negative of the surface integral of the magnetic field through any surface enclosed by the path.

The magnetic field of a long current-carrying wire is proportional to the current in the wire. One can show that there is a magnetic field passing through a surface enclosed by an RC circuit. (If current flows clockwise, the magnetic field is into the page, and if current flows counterclockwise, the magnetic field is out of the page.) Thus, there is a magnetic flux passing through the loop. Since magnetic field is proportional to current, the magnetic flux also depends on current as the area of the loop is not changing. Therefore, the magnetic flux through the circuit changes over time, so the line integral of the electric field through the circuit is non-zero, so it would not be valid to write V - q/C - Rdq/dt = 0.

Why do we still write V - q/C - Rdq/dt = 0 when there is a changing magnetic flux through the circuit?