Electrical power, Physics

Assignment Help:

Electrical power:

Electrical power (symbol P) is the rate at which work is done or the rate of conversion of energy by an electrical system.

2451_Electrical power.png

The SI unit of power is the watt which is a rate of work of 1 joule per second.

                   Therefore           P  =  V  *  I        

                   That is                watts  =  volts  *  amps

By substituting V  =  IR in the above formula, two other expressions for electrical power are obtained:

                                      P  =  VI  =  I2R  =  V2/R  watts

 


Related Discussions:- Electrical power

Define gas in harmonic well, Define Gas in Harmonic Well? A classical ...

Define Gas in Harmonic Well? A classical system of N distinguishable no interacting particles of mass m is placed in a three-dimensional harmonic well: a) Discover t

Motion in one dimension, an attacker at the base of a castle wall 3.65 m hi...

an attacker at the base of a castle wall 3.65 m high throws a rock straight up with speed 7.40 m/s at a height of 1.55 m above the ground. (a) will the rock reach the top of the wa

Are fibers optics systems expensive, Are fibers optics systems expensive? ...

Are fibers optics systems expensive? To find out whether a system is expensive one would have to establish a comparison with an option, which in most cases doesn't exist. To co

Spectrum, calour formed in pure and impure spectrum

calour formed in pure and impure spectrum

Evaluatre the magnitude of the gravitational force, A 2400-kg satellite is ...

A 2400-kg satellite is in a circular orbit around a planet. The satellite travels with a constant speed of 6.67x10 3 m/s. What is the acceleration of the satellite? Determine the m

Explain units and dimensions, Do not confuse units and dimensions. We can u...

Do not confuse units and dimensions. We can use dissimilar units to measure the same physical quantity. So, for example, you can calculate the mass in units of kilograms, poun

Eddington limit, Eddington limit (Sir A. Eddington) The theoretical li...

Eddington limit (Sir A. Eddington) The theoretical limit on which the photon pressure would go above the gravitational attraction of light-emitting body. i.e., a body emitting

Find total equivalent internal resistances of the batteries, For the circui...

For the circuits shown in Figure the resistors show the internal resistance of the batteries. Find, in each case: (i) The total e.m.f. across PQ (ii) The total equivalent in

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd