Learn Electrical Engineering
Explore key electrical parameters — voltage, current, power, resistance, reactance, and impedance essential for system analysis and design.
Electrical resistance is the opposition to electric current flowing through a conductor. Simply put, it blocks or reduces the movement of electrons through a conductor. When an electric current flows through a conductor, electrons drift from one end to the other end of the conductor. During this drifting, the moving free electrons collide with atoms … Read more
Let us discuss the effect of temperature on resistance. When the temperature of a conductor increases, its resistance also increases. This relation is linear. In other words, the change in resistance is directly proportional to the change in temperature. Mathematical Relationship If R1 is the initial resistance of a particular resistor or conductor at T1 … Read more
German physicist Georg Simon Ohm published his remarkable findings in 1827. This was the relationship between voltage, current, and resistance. We refer to this as Ohm’s Law. What Exactly is Ohm’s Law? Ohm’s Law states that the current flowing through a conductor is directly proportional to the voltage across the conductor and inversely proportional to … Read more
For Battery Sizing Calculation First, we consider a single battery bank for DC power for the entire substation. In our case, the DC system is 220V; hence, we first set the voltage rating of our battery to 220V. Here, we need to note for future extension of the substation. Because once we installed the battery … Read more
Let us have a detailed discussion on the Quality Factor and Dissipation Factor. We also call these two factors the Q factor and the D Factor. What is Quality Factor or Q Factor? The Quality Factor, or Q factor, is the dimensionless parameter that describes the efficiency and sharpness of the reactive components. The reactive … Read more
Power stations generate electric power. Electrical power transmission lines transmit the generated power to far places. The resistance and reactance of the line cause a voltage drop in the power. The Voltage Regulation of Transmission Line is the change in voltage between the sending and receiving ends. What is Voltage Regulation? We express the Voltage … Read more
Skin effect is a phenomenon that occurs in conductors. It mainly occurs while a conductor carries alternating current. Actually, an alternating current always tries to flow through the outer layer of a conductor. As a result, the current distribution across the cross-section of the conductor becomes uneven. Alternating current flows through the conductor at 50 … Read more