Current Electricity — Chapter Summary

Electric current is the rate

Electric current is the rate of flow of electric charge through a conductor. It is measured in amperes (A). Mathematically, I = dq/dt, where dq is the

Ohm's law states that the current

Ohm's law states that the current flowing through a conductor is directly proportional to the potential difference across its ends, provided physical

Resistance (R) is the opposition

Resistance (R) is the opposition a material offers to the flow of current. It depends on the material's length (l), area of cross-section (A), and res

In series

In series, resistances add up: R_eq = R₁ + R₂ + ... In parallel, reciprocals add: 1/R_eq = 1/R₁ + 1/R₂ + ... Series connection increases total resista

Kirchhoff’s First Law (Junction Rule) states

Kirchhoff’s First Law (Junction Rule) states that the sum of currents entering a junction equals the sum leaving it. Second Law (Loop Rule) states tha