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

Describe transistor stability parameters, Q. Describe transistor stability ...

Q. Describe transistor stability parameters The two parameters are · The stability factor ,K · Stability measure,ß1 These parameters determine the transistor stability

What are the drawbacks of microprocessor, There is a limitation on the size...

There is a limitation on the size of data. Most Microprocessor does not maintain floating-point operations.

Draw a one-line diagram of three-phase distribution system, Q. A three-phas...

Q. A three-phase transformer bank consisting of three 10-kVA, 2300:230-V, 60-Hz, single-phase transformers connected in Y- is used to step down the voltage. The loads are connecte

Give a brief description of integrating circuits, Q. Give a brief descripti...

Q. Give a brief description of integrating circuits ? Integration is a summation of area. An integrating circuit produces an output voltage which is proportional to the area en

Inductor, assignment for inductor

assignment for inductor

Direct and indirect semiconductors, Direct and Indirect Semiconductors ...

Direct and Indirect Semiconductors 1) In a common quantitative calculation of band structures, the wave function of a single electron traveling by a perfectly periodic lattice

Power plant, A power company is developing an upgrade to an existing power ...

A power company is developing an upgrade to an existing power plant and needs to make a requirements decision with respect to the maximum power output capacity for the upgrade. Thi

Draw the circuit of a two stage rc coupled amplifier, Q. Draw the circuit o...

Q. Draw the circuit of a two stage RC coupled amplifier?

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