To see how Newton's law plays out, it might help to see an experiment that separates the individual forces that combine to produce the Lorentz force: (qV X B) + qE
Here are two short YouTube videos that only take a few seconds to watch.
The first link below shows the MAGNETIC part of...
So you have 3 parallel branches: 2 mA current source, 9.2Kohm resistor, and a short. A perfect current source means it produces A FIXED CURRENT (2 mA in this case) but the voltage can vary, depending on the load you attach to it. Assuming your short has 0 ohms, all the current (2 mA) will...
In your first schematic, you label id as the "drain current" on your small-signal MOSFET model. Later, you use id to represent a completely different current involving two external resistors, Rd and RL. I'd choose another name, because id in your 2nd pic is definitely not the same as the...