Briefly explain energy and power, Electrical Engineering

Assignment Help:

Q. Briefly Explain Energy and Power?

If a charge dq gives up energy dw when going from point a to point b, then the voltage across those points is defined as

v = dw/dq

If dw/dq is positive, point a is at the higher potential. The voltage between two points is the work per unit positive charge required to move that charge between the two points. If dw and dq have the same sign, then energy is delivered by a positive charge going from a to b (or a negative charge going the other way). Conversely, charged particles gain energy inside a source where dw and dq have opposite polarities.

The load and source conventions are shown in Figure, in which point a is at a higher potential than point b. The load receives or absorbs energy because a positive charge goes in the direction of the current arrow from higher to lower potential. The source has a capacity to supply energy. The voltage source is sometimes known as an electromotive force,or emf, to convey the notation that it is a force that drives the current through the circuit.

67_Briefly explain energy and power.png


Related Discussions:- Briefly explain energy and power

Lda load accumulator direct instruction, LDA  Load Accumulator Direct Inst...

LDA  Load Accumulator Direct Instruction This instruction is used to copy  data from  memory whose  address is directly specified in the  instruction to th e accumulator. The i

Electronics, what is the difference between half &full wave rectifier

what is the difference between half &full wave rectifier

Merits and demerits of collector-to-base bias, Merits and Demerits of Colle...

Merits and Demerits of Collector-to-base bias: Merits: In this type of circuit the circuit stabilizes the operating point against differences in temperature and β (that i

8 bit data to memory - move immediate instruction , 8 bit  data to memory ...

8 bit  data to memory This form  of the  instruction is used to  copy 8 bit  data directly  to the memory  location pointed  by register pair HL.  The instruction  format is

Discuss in detail about pulse broadening graded index wave, Discuss in deta...

Discuss in detail about pulse broadening in graded index waveguide ? Intermodal dispersion within multimode fibers is minimized along with the use of graded index fibers, ther

Determine the Service and Backwash Rates, Determine the Service and Backwas...

Determine the Service and Backwash Rates The system on site is a pressure sand filter, with a service curve. The filter is backwashed using the feed pump, at a higher flow rate, s

Crossmagnetisation, what is crossmagnetisation in dc generator

what is crossmagnetisation in dc generator

Explain radio and television broadcasting, Q. Explain Radio and Television ...

Q. Explain Radio and Television Broadcasting? Radio (AM and FM) and television broadcasting are the most familiar forms of communication via analog transmission systems. The re

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