What is the direction is the magnetic force vectors pointing from a coil of wire that has current running through it? ...
How can I relate mg to R? Just to give you a scenario: If a free hanging weight was tied to a motor... I know the voltage (V) and current (I) so I can use V = IR to find R. What if I reduce the ...
If the induced emf in a circuit is negative, and current from this emf is the emf over the resistance, what happens to the negative sign in the induced emf when solving for the current? Surely there's ...