Linear Circuits 1 - 01 - Potential, Flow, and Resistance

Explore how potential difference drives current and how resistance shapes flow using water analogies. See how V = IR links volts, current, and resistance.

Explore a new take on Ohm's law by using delta V to calculate current through a resistance, with a ground reference and a 40-volt, 10-ohm example.

Voltage sources always boost circuit potential by their supply voltage, whether drawn as a dc source or a symbol, with examples like 5 v, 9 v, and 1.5 v batteries.

Learn that negative voltage sources follow the same equation as positive ones: v+ = v- + supply voltage, with -3 v and -12 v examples; the water analogy clarifies potential.

Apply Ohm's law to a circuit with a negative 10-volt supply, using ground as reference and delta V across 10 ohms to determine current direction.

discover how current flows from higher to lower potential, driven by potential differences, and apply ohm's law delta v equals i r, recognizing voltage sources maintain terminal voltages.

Determine node potentials Vd and Ve from the -2 V and 6 V sources, then compute I_f through the 220-ohm resistor using Ohm's law.

Relocate the ground to solve V_G and V_H; compute V_G = -5 V, V_H = +8 V, and apply Ohm's law for 680 Ω to get 19.1 mA.

solve a multi-source circuit by assigning node voltages, applying the relation between terminal voltages and supply voltages, and using ohm's law to compute the 33-ohm resistor current.