Electric Current

Electric current is defined as

Electric current is defined as the amount of charge crossing any cross-section of a conductor in one second. I = Q/t, where I is current in amperes, Q

The work done by electric force

The work done by electric force on unit positive charge to move it from one point to another in a conductor. V = W/q, measured in volts. It's the driv

The current through a conductor

The current through a conductor is directly proportional to the potential difference across it at constant temperature. V = IR, where R is resistance

Resistance is the opposition offered by

Resistance is the opposition offered by a conductor to the flow of electric current. R = ρl/A, where ρ is resistivity, l is length, and A is cross-sec

In series

In series: same current flows through all components, total resistance = R₁ + R₂ + R₃. In parallel: same voltage across all components, 1/R = 1/R₁ + 1