Current Electricity

Electric current is defined as

Electric current is defined as the rate of flow of electric charge. It is given by i = Q/t, where Q is charge and t is time. The SI unit is ampere (A)

Electric potential at a point

Electric potential at a point is the work done in bringing unit positive charge from infinity to that point. Potential difference between two points i

Resistance is the opposition offered

Resistance is the opposition offered to the flow of current by a conductor. It depends on the material's nature, length (R ∝ l), area of cross-section

Ohm's law states that current through

Ohm's law states that current through a conductor is directly proportional to the potential difference across it, provided physical conditions remain

Resistivity (ρ) is the resistance

Resistivity (ρ) is the resistance of a material with unit length and unit cross-sectional area. Its unit is Ω-m. Conductivity (σ) is the reciprocal of