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Formulas

Current Electricity

Showing formulas of Current Electricity

Physics
Subject
Electricity
Sub Subject
Showing 11 of 11 formulas Page 1 of 1

Ohm's Law

Physics → Electromagnetism → Current Electricity → Electrical Resistance
$$V = IR$$
States that the current through a conductor is proportional to the voltage across it.
📖 Physics 📚 Current Electricity

Power in Electrical Circuits

Physics → Electromagnetism → Current Electricity → Electrical Work
$$P = VI$$
The rate at which electrical energy is transferred by an electric circuit.
📖 Physics 📚 Current Electricity

Ohm's Law (Microscopic Form)

Physics → Electromagnetism → Current Electricity → Conductivity
$$\vec{J} = \sigma \vec{E}$$
Relates current density to the electric field within a conductor.
📖 Physics 📚 Current Electricity

Resistivity Formula

Physics → Electromagnetism → Current Electricity → Resistance
$$R = \rho \frac{L}{A}$$
Relates electrical resistance to the physical dimensions and material property of a conductor.
📖 Physics 📚 Current Electricity

Kirchhoff's Current Law (KCL)

Physics → Electromagnetism → Current Electricity → Circuit Laws
$$\sum I_{in} = \sum I_{out}$$
The total current entering a junction is equal to the total current leaving the junction.
📖 Physics 📚 Current Electricity

Parallel Resistors

Physics → Electromagnetism → Current Electricity → Circuit Combinations
$$\frac{1}{R_{eq}} = \sum \frac{1}{R_i}$$
Calculates total resistance when current has multiple paths.
📖 Physics 📚 Current Electricity

Kirchhoff's Voltage Law (KVL)

Physics → Electromagnetism → Current Electricity → Circuit Laws
$$\sum V = 0$$
The algebraic sum of all electrical potential differences around any closed network (loop) is zero.
📖 Physics 📚 Current Electricity

Average Power (DC)

Physics → Electromagnetism → Current Electricity → Power
$$P = VI = I^2R = \frac{V^2}{R}$$
The rate at which electrical energy is converted into other forms (like heat).
📖 Physics 📚 Current Electricity

Drift Velocity

Physics → Electricity → Current Electricity → Conduction
$$v_d = \frac{eE\tau}{m}$$
Average velocity attained by electrons in a conductor due to an electric field.
📖 Physics 📚 Current Electricity

Kirchhoff's Junction Rule (KCL)

Physics → Electricity → Current Electricity → Circuit Laws
$$\sum I_{in} = \sum I_{out}$$
Sum of currents entering a junction equals the sum of currents leaving it.
📖 Physics 📚 Current Electricity

Wheatstone Bridge Balance

Physics → Electricity → Current Electricity → Measuring Instruments
$$\frac{P}{Q} = \frac{R}{S}$$
Condition for zero current through the galvanometer in a bridge circuit.
📖 Physics 📚 Current Electricity
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