What is work energy theorem? Work energy theorem states that:“The net work done by the forces acting on the body is equal to the change in kinetic energy of the body.”Mathematically it is expressed as: Wnet = Kf –Ki = ∆k An unbalanced force applied to a particle will certainly change the particle’s state of motion.Newton’s second law provides us with one ...

Read More »## kepler's laws of planetary motion

kepler’s laws of planetary motion: Using newton’s laws of motion and law of universal gravitation,we can understand and analyze the behavior of all the bodies in the solar system:the orbits of the planets and comets about the sun and of natural and artificial satellites about their planets.We make two assumption that simplify the analysis: We consider the gravitational force only ...

Read More »## Bernoulli equation example

What is Bernoulli equation? Bernoulli’s equation is defined as:”The sum of pressure,the kinetic and potential energies per unit volume in a steady flow of an in compressible and non viscous fluid remains constant at every point of its path.”Mathematically it is expressed as: P+ ρgh +1/2 ρv2 =constant Bernoulli’s equation,which is a fundamental relation in fluid mechanics,is not a new principle but ...

Read More »## Efficiency of Carnot engine

Carnot Engine: Sadi Carnot in 1840 described an ideal engine using only isothermal and adiabatic processes.The carnot engine is free from friction and heat loses. Sadi showed that a heat engine operating in an ideal reversible cycle between two heat reservoirs at different temperatures would be the most efficient. Construction of carnot engine: It consists of following parts: A cylinder ...

Read More »## Intermolecular forces examples

What are intermolecular forces? Forces between molecules are of electromagnetic origin.All molecules contain electric charges in motion.These molecules are electrically neutral in the sense that the negative charge of the electron is equal and opposite charge to the positive charge of the nuclei.This does no mean,however that the molecules do not interact electrically.For example when two molecules approach each other ...

Read More »## Simple harmonic motion definition

What is simple harmonic motion? Simple harmonic motion is defined as:”When the net force is directly proportional to the displacement from the mean position and is always directed towards mean position.” A body is said to be vibrating if it moves back and forth or to and fro about a point.Another term for vibration is oscillation.A special kind of vibratory ...

Read More »## Unit of measuring Intensity of sound

What is intensity of sound? “Sound energy passing per second through a unit area held perpendicular to the direction of propagation of sound waves is called intensity of sound.”The sound waves transfer energy from the sounding body to the listener.The intensity of sound depends on the amplitude of sound waves.Intensity is a physical quantity and can be measured accurately.The unit ...

Read More »## Basic Forces Of Nature

Fundamental forces of nature: The man has always desired to comprehend the complexity of nature in terms of as few elementary concepts as possible. Among its quest, in Feynman’s words,has been the one for “wheel within wheels”, the task of Natural Philosophy being to discover the inner most wheels if any such exits. A second quest has concentrated itself with ...

Read More »## Differential Operational Amplifier circuit

What is Operational Amplifiers: Early operational amplifiers (op-amps) were used primarily to perform mathematical operations such as addition, subtraction, integration, and differentiation—thus the term operational. These early devices were constructed with vacuum tubes and worked with high voltages. Today’s op-amps are linear integrated circuits (IC s) that use relatively low dc supply voltages and are reliable and inexpensive. The standard operational amplifier (op-amp) symbol ...

Read More »## How Mosfet transistor works

What is Mosfet? The Mosfet (metal oxide semiconductor field-effect transistor) is another category of field-effect transistor. The MOSFET, different from the JFET, has no pn junction structure ; instead, the gate of the MOSFET is insulated from the channel by a silicon dioxide (SiO2) layer. The two basic types of MOSFETs are enhancement (E) and depletion (D). Of the two types, the enhancement MOSFET is more ...

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