Electrical and electronics engineering

Common Electrical Engineering Formulas: 1. Ohm's Law: V = I * R - V: Voltage (in volts) - I: Current (in amperes) - R: Resistance (in ohms) 2. Power in a DC Circuit: P = V * I - P: Power (in watts) - V: Voltage (in volts) - I: Current (in amperes) 3. Power in an AC Circuit: P = V * I * cos(θ) - P: Power (in watts) - V: Voltage (in volts) - I: Current (in amperes) - θ: Phase angle between voltage and current 4. Capacitance: C = Q / V - C: Capacitance (in farads) - Q: Electric charge (in coulombs) - V: Voltage (in volts) 5. Inductance: L = Φ / I - L: Inductance (in henries) - Φ: Magnetic flux (in webers) - I: Current (in amperes) 6. Impedance of a Resistor: Z = R - Z: Impedance (in ohms) - R: Resistance (in ohms) 7. Impedance of a Capacitor: Z = 1 / (jωC) - Z: Impedance (in ohms) - j: Imaginary unit (√-1) - ω: Angular frequency (in radians per second) - C: Capacitance (in farads) 8. Impedance of an Inductor: Z = jωL - Z: Impedance (in ohms) - j: Imaginary unit (√-1) - ω: Angular frequency (in radians per second) - L: Inductance (in henries) 9. Kirchhoff's Voltage Law (KVL): Σ(Voltage drops) = Σ(Voltage sources) - The sum of voltage drops across components in a closed loop is equal to the sum of the voltage sources in that loop. 10. Kirchhoff's Current Law (KCL): Σ(Currents entering a node) = Σ(Currents leaving a node) - The sum of currents entering a node is equal to the sum of currents leaving that node.

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