Electricity — Chapter Summary

Electric current is the rate

Electric current is the rate of flow of electric charge through a conductor. It is given by I = Q/t, where I is current, Q is charge, and t is time. T

A continuous and closed path through

A continuous and closed path through which current flows is called an electric circuit. If the path is broken, current stops and the bulb does not glo

Potential difference is the work done

Potential difference is the work done per unit charge in moving charge between two points. It is given by V = W/Q. One volt equals one joule per coulo

For a metallic conductor at constant

For a metallic conductor at constant temperature, potential difference is directly proportional to current. The relation is V = IR, so I = V/R and R =

Resistance is the opposition offered by

Resistance is the opposition offered by a conductor to the flow of current. For a uniform metallic conductor, R = ρl/A, so resistance increases with l