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

Power, why do we use commutator?

why do we use commutator?

Show output characteristic of common emitter configuration, Q. Show output ...

Q. Show output Characteristic Of Common Emitter Configuration? Output characteristics: This family of curves may be divided into three regions just as was done for common base

Humming , I am getting humming noice in speaker when I connect to laptop on...

I am getting humming noice in speaker when I connect to laptop on ac when I put it on dc (battery) it''s dispear . Please help

Different types of errors in measurement, Q.   Enumerate different types o...

Q.   Enumerate different types of errors in  measurement. How can these errors be minimized.                Sol. Types of errors: Errors may arise from different sources and

For the nor and inverter realizations, Q. For the NOR and inverter realizat...

Q. For the NOR and inverter realizations shown in Figure, find the truth table, the type of gate realized, and the expression for the logic output, in each case.

Inductor, What will I write in Inductor conclusion

What will I write in Inductor conclusion

Technical loss reduction - power supply, Technical Loss Reduction - Power S...

Technical Loss Reduction - Power Supply 1. Technical loss reduction could be achieved through several measures such as network reconfiguration, load balancing, network recondu

Life interactive ups systems , Normal 0 false false false ...

Normal 0 false false false EN-IN X-NONE X-NONE Life   Interactive UPS Systems

Determine the bandwidth required for transmission, 1. A PCM system uses 8 b...

1. A PCM system uses 8 bits per sample and the analog signal is limited to 4.3 kHz. The PCM data is transmitted using (a) BFSK and (b) ASK. Determine the bandwidth required for tra

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