Author: Tru Physics
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Kirchhoff’s Laws
Introduction Kirchhoff’s Laws, formulated by Gustav Kirchhoff, are fundamental to circuit analysis and design. They provide a set of rules that help us understand how electrical charge and energy behave in electrical circuits. They include two main laws: Kirchhoff’s Current Law (KCL) and Kirchhoff’s Voltage Law (KVL). Kirchhoff’s Current Law (KCL) Kirchhoff’s Current Law, also…
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Kinetic Theory of Gases
Introduction The Kinetic Theory of Gases is a simple, yet powerful model that explains the properties of gases in terms of the motion of their constituent particles. It provides a microscopic explanation for macroscopic properties such as pressure, temperature, and volume. Assumptions of the Kinetic Theory of Gases Ideal Gas Law The ideal gas law…
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Kepler’s Laws
Introduction Kepler’s laws of planetary motion, derived by Johannes Kepler in the 17th century, provide a description of the motion of planets in their orbits around the Sun. They were revolutionary in their assertion that planets move in elliptical orbits and not perfect circles as previously thought. These laws are crucial to our understanding of…
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Joule’s Law
Introduction Joule’s Law, named after the English physicist James Prescott Joule, is a fundamental principle in the field of electrical engineering and physics. It describes the relationship between the heat generated and the current flowing through a conductor. Basic Formulation Joule’s Law can be expressed as: where: The heat is measured in joules (J), current…
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Joule (unit)
Introduction The joule is the standard unit of energy in the International System of Units (SI). It is named after the British physicist James Prescott Joule. The joule is used across many fields of physics, including mechanics, electricity, and thermodynamics. Definition One joule is defined as the amount of energy transferred when a force of…
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Jeans Instability
Introduction Jeans Instability is a fundamental concept in astrophysics that describes the condition under which a self-gravitating gas cloud will collapse under its own gravity to form a star. This process is named after the British physicist Sir James Jeans, who first derived the relevant equations in 1902. Basic Principle The basic idea behind Jeans…
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Interferometry
Introduction Interferometry is a family of techniques in physics which use the phenomenon of interference to make precise measurements of various quantities. It involves superposing (or “mixing”) waves to extract information about the waves or the media they have interacted with. Basic Principle The basic principle of interferometry involves splitting a wave into two or…
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Interference
Introduction Interference is a fundamental concept in wave theory, describing the phenomenon where two or more waves combine to form a resultant wave. The principle of interference is central to many areas of physics, including optics, acoustics, and quantum mechanics. Constructive and Destructive Interference When two waves meet, they interfere with each other. The superposition…
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Inertial Frame
Introduction An inertial frame of reference, in physics, is a frame of reference in which Newton’s first law of motion — the law of inertia — holds true. That is, in an inertial frame, an object not acted upon by a net external force moves with a constant velocity. Defining Inertial Frame By definition, an…
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Inertia
Introduction Inertia is a fundamental concept in physics that describes the tendency of an object to resist changes in its state of motion. This inherent property of matter is central to Newton’s First Law of Motion and forms the basis of classical mechanics. Newton’s First Law and Inertia Newton’s First Law of Motion, also known…