Electrical-Power-Notes-and-Formulas(PDF COPY)

Certainly! Here are some fundamental electrical power notes and formulas:

1. Power (P): The rate at which work is done or energy is transferred, measured in watts (W). $P=VI$ where $P$ is power, $V$ is voltage, and $I$ is current.

2. Ohm's Law: Relates voltage, current, and resistance. $V=IR$ where $V$ is voltage, $I$ is current, and $R$ is resistance.

3. Power in terms of Resistance: Another expression for power using resistance. $P=I^{2}R$ or $P=\frac{V^2}{R}$

4. Power in a DC Circuit: Power calculation using voltage and current. $P=VI\cos (\theta )$ where $\theta$ is the phase angle (for AC circuits).

5. Power in an AC Circuit (True Power): Considering power factor. $P=VI\cos (\theta )$ where $\theta$ is the phase angle.

6. Apparent Power (S): The product of voltage and current in an AC circuit. $S=VI$

7. Reactive Power (Q): The product of voltage, current, and the sine of the phase angle. $Q=VI\sin (\theta )$

8. Power Factor (PF): The ratio of true power to apparent power. $\text{PF}=\frac{P}{S}$

These are foundational formulas, and there are variations depending on the specific context or type of circuit. Let me know if you need information on a particular aspect or if you have specific questions!

You have to wait 03 seconds.

Download Timer