Electrical Engineering GATE EE Solved Question Paper 2026  

In digital electronics, a register is a group of flip-flops used to store and move binary data (\(1s\) and \(0s\)) within a system. Think of it as a small, high-speed “workspace” inside a processor that holds information temporarily so it can be used immediately. Key Characteristics Storage Element: It is built using Flip-Flops (usually D-type). …

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A step-down chopper is a static power electronic device that converts a fixed DC input voltage into a variable, lower DC output voltage. It functions similarly to an AC transformer but for DC circuits, allowing for efficient voltage regulation without the bulky size of traditional transformers. Principle of Step-Down Chopper In a step-down chopper, the thyristor …

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In an atom, the behavior of electrons is determined by their energy levels. To understand how materials conduct electricity, we look at the Valence Band and the Conduction Band. Valence Electrons Valence electrons are the electrons located in the outermost shell of an atom. They are the furthest from the nucleus and are responsible for …

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The atom is the fundamental building block of everything we see, touch, and breathe. From the screen you are reading this on to the air in your lungs, everything is made of these incredibly tiny units of matter. What is an Atom? An atom is the smallest unit of an element that retains the properties …

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In the world of power electronics, the TRIAC (Triode for Alternating Current) is a vital semiconductor device. While a standard Thyristor (SCR) only conducts in one direction, a TRIAC is designed to control power in both halves of an AC cycle, making it the go-to component for household AC dimmers and motor controllers. What is …

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An RLE Load consists of a Resistor ($R$), an Inductor ($L$), and a DC voltage source ($E$)—often representing a battery being charged or the back EMF of a DC motor. This configuration introduces unique constraints on the thyristor’s conduction compared to simpler loads. The Firing Constraint: Minimum Angle ($\theta_1$) Unlike R or RL loads, the …

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In a standard $RL$ load rectifier, the inductor’s energy storage causes the output voltage to dip into the negative region, reducing the overall DC efficiency. By adding a Freewheeling Diode (FD) in parallel with the load, we can significantly enhance the circuit’s performance and protect the components. Why Use a Freewheeling Diode? The primary purpose …

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In power electronics, most real-world loads (like motors or transformers) are not purely resistive; they contain inductance. This article explores the Single Phase Half Wave Controlled Rectifier with an R-L Load, highlighting how inductance changes the behavior of the output voltage and current. The Role of Inductance ($L$) In a purely resistive load, the current …

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A Single Phase Half Wave Controlled Rectifier is a power electronics circuit used to convert an AC input into a variable DC output. By using a Thyristor (SCR) instead of a simple diode, we can control exactly when the conduction starts, allowing for precise voltage regulation. Circuit Components AC Source: Typically represented as $v_s = …

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