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Electrical circuits - lecture

John Smith Blogger on August 01, 2013

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The effects of three-phase harmonics

John Smith Blogger on July 13, 2013

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HIGH-VOLTAGE (HV) TRANSMISSION LINE PROTECTION SCHEMES

John Smith Blogger on July 13, 2013

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String Effeciency and methods to improve String Effeciency

John Smith Blogger on July 11, 2013

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Voltage ranges

John Smith Blogger on July 08, 2013

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Synchronization process

John Smith Blogger on July 08, 2013

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Sizing of protective earthing conductor

John Smith Blogger on July 08, 2013

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Why Does Graphite Conduct Electricity? The Surprising Science Explained

Why Does Graphite Conduct Electricity? Graphite is one of those fascinating materials that seems to defy expectations. Unlike most non-metals, it conducts electricity something we usually associate with metals like copper or silver. But why? Let’s dive into the science behind graphite’s electrical conductivity and explore why this everyday material is so special. The Unique Structure of Graphite What Makes Graphite Different? Graphite is made up of carbon atoms arranged in layers. Each layer consists of hexagonal rings, much like a honeycomb. These layers are called graphene sheets, and they’re only weakly bonded to each other, which is why graphite feels slippery (it’s often used in pencils!). But here’s the key: within each graphene sheet, carbon atoms share delocalized electrons. These electrons are free to move, allowing electricity to flow similar to how electrons move in metals. Why Don’t Other Forms of Carbon Conduct Electricity? Not all carbon-based materials conduct elec...

Does Lead Conduct Electricity? The Surprising Truth

Does Lead Conduct Electricity? A Deep Dive Into Its Conductivity If you've ever wondered, "Does lead conduct electricity?", you're not alone. Lead is a fascinating metal with unique properties that make it useful in various industries, from batteries to construction. But how well does it actually conduct electricity? Let’s explore the science behind lead’s electrical conductivity and where it stands compared to other metals. How Well Does Lead Conduct Electricity ? Lead does conduct electricity, but not as effectively as metals like copper or silver. Its conductivity is relatively low compared to other conductive metals, which is why it isn’t typically used in high-performance electrical wiring. Lead’s Electrical Conductivity in Numbers Electrical Conductivity: ~4.55 × 10⁶ S/m (Siemens per meter) Resistivity: ~22 × 10⁻⁸ Ω·m (Ohm-meters) Comparison: Copper has a conductivity of ~59.6 × 10⁶ S/m, making it about 13 times more conductive than lead. These numbers show th...

When Was Electricity First Used in Homes? The Shocking History

The Dawn of Electric Light: When Was Electricity First Used in Homes? Electricity is something we take for granted today, but there was a time when homes relied on candles, oil lamps, and gaslight. So, when was electricity first used in homes? The answer takes us back to the late 19th century, a time of innovation and bold experiments that forever changed how we live. In this article, we’ll explore the fascinating journey of residential electricity—from its earliest experiments to the moment it became a household necessity. The First Homes to Use Electricity The Early Experiments (1870s-1880s) Before electricity became widespread, inventors like Thomas Edison and Nikola Tesla were hard at work. Edison’s Pearl Street Station in New York City (1882) was the first commercial power plant, supplying electricity to a handful of wealthy homes and businesses. These early adopters enjoyed electric lighting, a luxury that replaced sooty gas lamps and fire hazards. However, most Americans w...

Electric Shock Dangers: How Many Volts Can the Human Body Handle

How Many Volts Can a Human Withstand? Electricity powers our world, but it can also be deadly. Many people wonder, how many volts can a human withstand? The answer isn’t as simple as a single number—factors like current, duration, and body resistance play crucial roles. While low-voltage shocks may only cause a tingle, high-voltage exposure can be fatal. Let’s explore how electricity affects the body and what voltage levels are dangerous. Voltage vs. Current: What Matters More? People often focus on volts, but amperage (current) is the real danger. Here’s why: Voltage (V): The force pushing electricity through a circuit. Current (A): The actual flow of electricity—even 0.1 amps can be lethal. Human body resistance varies (dry skin: 100,000 ohms; wet skin: 1,000 ohms). Higher voltage can overcome resistance, allowing more current to flow. How Many Volts Are Dangerous to Humans? The effects of electric shock depend on voltage, current, and exposure time: Voltage Range Effect on the Body ...

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This article was originally published on Electrical Library—your go-to resource for energy-saving tips, home efficiency guides, and smart ways to reduce electricity costs.