Top Electrical Formulas

 

There are many important formulas used in the field of electrical engineering, some of the most fundamental ones are:

Ohm's Law: V = I * R, where V is the voltage, I is the current, and R is the resistance. This equation states that the voltage across a resistor is directly proportional to the current flowing through it and inversely proportional to the resistance.

Power: P = V * I, where P is the power, V is the voltage, and I is the current. This equation states that the power is equal to the voltage multiplied by the current.

Power Factor: Power Factor = P / (V * I), where P is the real power, V is the voltage and I is the current. The power factor is a measure of how effectively the current is being used to do useful work, and it is always between 0 and 1.

Kirchhoff's Voltage Law (KVL): The sum of all the voltages around a closed loop in an electrical circuit must be equal to zero. This equation states that the total emf in any closed loop is equal to the sum of the voltages across each component in the loop.

Kirchhoff's Current Law (KCL): The sum of the currents entering and leaving a node in an electrical circuit must be equal to zero. This equation states that the total current flowing into a node is equal to the total current flowing out of the node.

Impedance: Z = √(R² + X²), where Z is the impedance, R is the resistance, and X is the reactance. This equation states that the impedance is the vector sum of the resistance and reactance in an AC circuit.

Capacitance: C = Q / V, where C is the capacitance, Q is the charge and V is the voltage. This equation states that the capacitance is the ratio of the charge stored in a capacitor to the voltage across it.

Inductance: L = V / I, where L is the inductance, V is the voltage and I is the current. This equation states that the inductance is the ratio of the voltage across an inductor to the current flowing through it.

These are some of the most basic and important formulas used in electrical engineering and understanding these concepts will help you in understanding more complex topics in the field.