Formula Note
Ohm’s Law
V = I RAt constant temperature, current is directly proportional to potential difference.
Current Electricity – Sticky Notes
Quick revision notes for formulas, concepts and diagrams.
Concept Note
Electric Current
I = q / tRate of flow of electric charge through any cross-section of a conductor.
Formula Note
Series Combination
Rₛ = R₁ + R₂ + R₃Equivalent resistance in series equals the sum of individual resistances.
Concept Note
Parallel Combination
1/Rₚ = 1/R₁ + 1/R₂Reciprocal of equivalent resistance equals sum of reciprocals.
Formula Note
Electric Power
P = V I = I²RRate at which electrical energy is converted or consumed.
Concept Note
EMF
ε = W/qWork done by source per unit charge in moving charge around complete circuit.