Define resistance in lumped-circuit, Electrical Engineering

Assignment Help:

Q. Define Resistance in lumped-circuit?

An ideal resistor is a circuit element with the property that the current through it is linearly proportional to the potential difference across its terminals,

i = v/R = Gv, or v = iR

which is known as Ohm's law, published in 1827. R is known as the resistance of the resistor with the SI unit of ohms (), and G is the reciprocal of resistance called conductance, with the SI unit of siemens (S). The circuit symbols of fixed and variable resistors are shown in Figure, along with an illustration of Ohm's law. Most resistors used in practice are good approximations to linear resistors for large ranges of current, and their i-v characteristic (current versus voltage plot) is a straight line.

The value of resistance is determined mainly by the physical dimensions and the resistivity ρ of the material of which the resistor is composed. For a bar of resistive material of length l and cross-sectional area A the resistance is given by

960_Resistance.png

where ρ is the resistivity of the material in ohm-meters ( · m), and σ is the conductivity of the material in S/m, which is the reciprocal of the resistivity.Metal wires are often considered as ideal

380_Resistance1.png


Related Discussions:- Define resistance in lumped-circuit

Explain super scalar architecture, Explain super scalar architecture. ...

Explain super scalar architecture. The Pentium microprocessor is organized along with three execution units. Single is executes floating-point instructions, and another two (U

Instrumentation, explain measurement of frqueny and phase using cro

explain measurement of frqueny and phase using cro

Compute efficiency of 4 hours full load at 0.8 power factor, Q. A 10-kVA tr...

Q. A 10-kVA transformer is known to have an iron loss of 150 W and a full-load copper loss of 250 W. If the transformer has the following load cycle, compute its all-day efficiency

Explain the methods of analysis for digital system, Q. Explain the Methods ...

Q. Explain the Methods of Analysis for digital system? Just as differential equations are used to represent systems with analog signals, difference equations are used for syste

Zener breakdown voltage, (a) For the Zener diode series voltage regulator s...

(a) For the Zener diode series voltage regulator shown in the Figure. calculate V L , I Z , V R and P Z for R L = 1.2 KΩ and repeat it for R L = 3 KΩ ? Consider Zener breakdow

Program description , Program Description In the above  program  any t...

Program Description In the above  program  any two  numbers can be stored in register A and B ( by  replacing XX  and YY). Contents  of B are  compared with A. If  B CY = 0

Sr flip flop - introduction to microprocessors , SR Flip Flop The SR  f...

SR Flip Flop The SR  flip  flop is an arrangement  of logic gates that maintain astable output even after  the  input  are turned off.  It has  two  inputs namely  SET input (S

Mainframes - introduction to microprocessors , Mainframes Computers lar...

Mainframes Computers larger than minicomputer more power  operating at very high speed  called  mainframes.  They  can processes 64  bit data.  Such computers are used  in defe

Electric Machines, Ask questiDesing a suitable double - layer lap windingon...

Ask questiDesing a suitable double - layer lap windingon #Minimum 100 words accepted#

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