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.

Define amps as coulombs per second and show how current does work—from motors to lights and cell phones—via voltage and resistance. Apply ohm's law to see how resistance affects current.

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.

Apply ohm's law with delta v to determine current through a 16 ohm resistor and the potentials at nodes A and B, given two voltage sources and a ground.

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.