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

Simple Harmonic Motion And Waves, Easy definition with explanation of FREQU...

Easy definition with explanation of FREQUENCY, WAVELENGTH, AMPLITUDE, DAMPED OSCILLATIONS.

Determine about the rod in magnetic coil, Determine about the rod in magnet...

Determine about the rod in magnetic coil the rod is placed in a magnetic coil deliver alternating current, the rod suffers a change within length for each half cycle of alterna

Radioactivity, Why nuclear fission preceeds nuclear fusion?

Why nuclear fission preceeds nuclear fusion?

Disadvantages of low power factor, Disadvantages of Low Power factor G...

Disadvantages of Low Power factor Greater conductor size : To transfer or distribute a fixed amount of power at constant voltage, the conductor will have to carry more current

A floater to show surface tension, A floater to show surface tension Be...

A floater to show surface tension Bend a piece of small copper wire into a ring about 8 cm in diameter. Attach two other pieces of wire rigidly to conflicting sides of the ring

Atomic theory, The matter consists of one or more basic substances called e...

The matter consists of one or more basic substances called elements. An element is a substance whose all atoms are alike. Cohesion between atoms arises atoms because of interaction

Show principles of special theory of relativity, Using principles of specia...

Using principles of special theory of relativity derive mass energy relation, illustrate it with an example. A beam of particle of half life 2.0 x 10-8 sec. travels in a laborat

Measure the electric flux density, Two parallel rectangular plates measurin...

Two parallel rectangular plates measuring 20 cm by 40 cm carry an electric charge of 0.2µC. Measure the electric flux density. If the plates are spaced 5mm apart and the vo

Give the location of the image and the magnification, Q. A 4.5cm needle is ...

Q. A 4.5cm needle is placed 12cm away from a convex mirror of focal length 15cm. Give the location of the image and the magnification. Describe what happens as the needle is moved

Health , how do my boobs get so big ang why do i have hair down there

how do my boobs get so big ang why do i have hair down there

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