Electrical Calculators: Ohm’s Law, Power, AC Current, Resistors, Voltage Divider Electrical Calculators Use these free tools to calculate Ohm’s Law, Power, AC current (single & three‑phase), series/parallel resistors, and voltage divider. Ohm’s Law (DC) Enter any two values; the third will be calculated. Formulas: V = I·R, I = V/R, R = V/I. Voltage V … Read more
Back EMF in Motors — Definition, Formula, Derivation & Examples A practical guide to understanding back EMF (counter EMF) in DC and AC machines with step‑by‑step examples and a quick calculator. Updated: October 14, 2025 What is Back EMF? Back EMF (also called counter electromotive force) is the voltage induced in a motor’s … Read more
Ambient Backscatter Communication: A Complete Guide for Battery-Free IoT Sensors Discover how Ambient Backscatter enables battery-free IoT communication using existing RF signals. Learn its working principle, components, and build your own sensor. Introduction The rise of the Internet of Things (IoT) demands energy-efficient, maintenance-free wireless sensors. Traditional sensors rely on batteries, which limit lifespan and … Read more
By ElectroGuide.tech 📑 Table of Contents What is a Magnetically Controlled Shunt Reactor (MCSR)? Why Reactive Power Compensation is Crucial How MCSR Works: Design and Control Principles MCSR vs Fixed Shunt Reactors Applications of MCSR in HV and EHV Substations MCSR Impact on Ferranti Effect and Voltage Stability Capacitor Banks vs MCSRs: Which to Choose? … Read more
In modern power systems, reactive power compensation in substations is essential to maintain voltage levels, improve power factor, and enhance overall grid stability. This article explains the types of equipment used, how they work, practical applications, and how you can design an efficient compensation system. Whether you’re an engineer, utility planner, or student, this guide … Read more
🔋 Shunt Reactors and Capacitor Banks in Substations: Voltage Control, Reactive Power, and Harmonic Filtering By ElectroGuide.tech 📅 Introduction Power quality is a critical aspect of modern substations, especially with increasing grid complexity and distributed energy sources. Among the key tools used for maintaining voltage stability and improving reactive power balance are shunt reactors, capacitor … Read more
Section A: Fundamentals of Electrical Safety (Q1–Q20) Why is grounding important in an electrical system? a) It enhances voltage output b) It improves energy efficiency c) It provides a safe path for fault current to flow d) It reduces insulation thickness requirementsAnswer: c) It provides a safe path for fault current to flowExplanation: Grounding helps … Read more
What is Back EMF in DC Motor? Working, Formula & Significance of Back EMF Table of Contents What is Back EMF in a DC Motor? How Back EMF is Generated Back EMF Formula in DC Motor Role of Back EMF in Armature Current Regulation Voltage Equation of a DC Motor Power Equation and Its Significance … Read more
Got it! Here’s your improved WordPress blog in plain text format (no HTML tags), ready to paste directly into the WordPress visual editor — with proper headings, internal linking suggestions, transition words, and improved readability. Power Transformer vs Instrument Transformer: Key Differences Explained In the modern electrical grid, transformers play a silent but crucial role. … Read more
When designing or analyzing an electrical measurement and protection system, one of the most important aspects to understand is the accuracy class of Current Transformers (CTs) and Potential Transformers (PTs). These instrument transformers are essential for stepping down high voltages and currents to safe and measurable levels. But how accurately they perform that job depends … Read more