Tag: Power
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Intensity
Introduction to Intensity In physics, intensity is a measure of the energy flux, or the power per unit area. It is commonly used to describe various phenomena such as light, sound, and electric fields. It quantifies how much energy passes through a specific area in a given time period. Mathematical Definition of Intensity In the…
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Poynting Vector
Introduction The Poynting vector is a fundamental concept in electromagnetism representing the directional energy flux density (the rate of energy transfer per unit area, in Watts per square meter) of an electromagnetic field. It is named after its inventor, the physicist John Henry Poynting. Definition the Poynting Vector The Poynting vector is defined as the…
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Power
Introduction Power is a fundamental concept in physics. It is the rate at which work is done or energy is transferred. In other words, power measures how quickly work is done. Basic Definition The basic formula for power is given by the work done divided by the time taken to do the work: where: Power…
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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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How much energy is required to power all of NYC for a day…
How much energy is required to power all of New York City for a day, and how does that compare to the energy output of the Sun?