Understanding inductive reactance (XL) and capacitive reactance (XC) is essential for analyzing AC circuits, designing filters, oscillators, power electronics systems, and communication circuits. This article explains all fundamental concepts including resistance, reactance, impedance, frequency response, graphs, ideal and real component behavior, solved examples, advantages, disadvantages, and applications. In electronic circuits, especially those operating with alternating […]
RL Filter Circuit is a fundamental passive filtering circuits that use a resistor (R) and an inductor (L) to control signal frequency. Like RC filters, RL filters are first-order filters, but instead of capacitive reactance, they rely on inductive reactance, which increases with frequency. Because of their simple structure and predictable frequency behavior, RL filters […]
A Varistor is a voltage-dependent, non-linear resistor whose resistance changes significantly with applied voltage. The term varistor is derived from “variable resistor”, but unlike potentiometers or rheostats, its resistance varies automatically with voltage, not mechanically. Varistors are primarily used for over-voltage protection. Under normal operating voltage, a varistor behaves like a very high resistance device. […]
A thermistor is a temperature-sensitive passive electronic component whose resistance changes significantly with temperature. The term thermistor is derived from Thermally sensitive resistor. Unlike standard resistors whose resistance remains nearly constant over temperature, thermistors are designed to exhibit large, predictable resistance variations with temperature changes. Thermistors are widely used in: Temperature measurement and control Over-temperature […]
A trimmer resistor, commonly known as a trim-pot (trimming potentiometer), is a small adjustable resistor designed for fine-tuning, calibration, and preset adjustment of electronic circuits. Unlike standard potentiometers that are frequently adjusted by the user, trimmer resistors are usually set once during manufacturing, testing, or servicing, and then left unchanged for long periods. Trimmer resistors […]
A rheostat is a variable resistor specifically designed to control current in an electrical or electronic circuit without interrupting the circuit. Unlike potentiometers, which are mainly used for voltage division, rheostats are typically employed in series with a load to adjust current flow. Rheostats are widely used in power control applications, such as motor speed […]