As we already know, a low-pass filter selectively permits signals with frequencies lower than its cutoff frequency fc to pass through. This shows that although the high-frequency elements of the input signal are attenuated (weakened), the lower-frequency elements are retained in the output. A passive high-pass filter, on the other hand, functions in the opposite […]
Learning Passive Low Pass Filter Circuit Calculations
Basically passive RC filters are circuits that separate various frequencies within a signal. We can consider a signal as a collection of distinct-pitched noises. We can make an RC filter to only allow high-pitched sounds to pass through (such as a treble filter) or only the low-pitched sounds to pass through (similar to a bass […]
Understanding Capacitive Reactance with Formulas
Capacitors have a special way of opposing alternating current (AC) which is called capacitive reactance. This is like an internal resistance in the capacitor which changes based on the frequency of the electricity flowing through it. Unlike normal resistance which stays the same, no matter how fast the electricity changes (frequency), capacitive reactance is affected […]
Understanding Superposition Theorem, with Calculations
One method for analyzing electrical circuits is the Superposition Theorem. It is applicable to circuits that have several independent sources of voltage or current. The theorem basically enables us to dissect the functioning of the circuit and examine the role played by each source separately. In order to accomplish this, we temporarily disable all other […]
Understanding Electrical Energy and Power, with Calculations
Just think about turning on a light switch and the entire room is filled with light. That is how electrical energy can work its magic. It is that which provides the impetus for many activities in our everyday existence. But what exactly is it? Electrical energy is not only the ability to light up a […]
Understanding Current Divider Circuits, with Calculations
Basically, circuits with parallel components serve as current dividers. Through these circuits, the supply’s total current is divided among many parallel pathways. A practical connectivity system is formed by all components sharing the same two connecting points. With this configuration, the current can flow through a variety of branches and routes. Interestingly, each component’s current […]