An electronic system, with closed loop current flow, and relative electrical potentials present across electrical components.

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How does mass relate to resistance (Ohm's Law)

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 ...
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Current from induced emf

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 ...