Suppose I have a simple circuit with a 9V battery that is connected to a DC motor, causing it to spin. Then I suddenly squeeze the motor shaft between my thumb and fore fingers, and bring it to a sudden stop.
How can understand what happens to circuit voltages and currents immediately after this event, as well as longer term? For instance, if I hold the motor for a long time, will the battery continue to feed power into the system? If so, will the power be more or less than when the motor was spinning? Would the difference in power between the two scenarios be completely different magnitudes (i.e would something start burning? if so, would it be the battery or the motor)?
Immediately after I stop the motor, will there be a large spike in something (current?)? How would I calculate the magnitude of the spike based on the current prior to the event, number of windings, physical dimensions, time scale of the event, etc.
I just don't have a good mental model of how to think about motor behavior when they are in a "failure" mode.