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

Differences between enhancement and depletion mosfet, Q. What Are the Diffe...

Q. What Are the Differences Between Enhancement And Depletion Mosfet? Depletion MOSFET:Here a slab of p_type material is formed from a silicon base and referred to as substrate

Define voltage source multiplying dac, Define Voltage Source Multiplying DA...

Define Voltage Source Multiplying DAC? Voltage source multiplying DACs use a reference voltage which is switched in or out by the digital data.  The converter is so-named becau

Draw a block diagram of a 4-bit pipo register, Q. Draw a block diagram of a...

Q. Draw a block diagram of a 4-bit PIPO register and briefly describe its operation. Q. Taking parallel data from a computer to be fed out over a single transmission line needs

What is inductor, What is Inductor Inductor, also known as a choke, is ...

What is Inductor Inductor, also known as a choke, is another passive type electrical component designed to take benefit of this relationship by forming a much stronger magnetic

Squeeze castings, Squeeze Castings: Squeeze casting, also known as ...

Squeeze Castings: Squeeze casting, also known as liquid metal forging, is a combination of casting and forging process . The molten metal is poured into the bottom half

Communication systems/theory, have 18 multiple choice questions i need answ...

have 18 multiple choice questions i need answered by 9am cst and will pay Need ASAP

Discuss dma operation in brief, Discuss DMA operation in brief. The fun...

Discuss DMA operation in brief. The fundamental idea of DMA is to transfer blocks of data directly among memory and peripherals. The data don't suffer the microprocessor but th

Electro magnetism, ELECTRO MAGNETISM: In this unit we learned about el...

ELECTRO MAGNETISM: In this unit we learned about electromagnetism and the relationship that presents between and magnetic flux and electric current. The way in which electric

Discuss the closed-loop behavior, Q. Discuss the closed-loop behavior? ...

Q. Discuss the closed-loop behavior? Consider an elementary feedback control system, as shown in Figure, with H = 1. The output variable c and the input e to the direct transmi

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