Volume resistance and surface resistance, Physics

Assignment Help:

Volume resistance: The resistance provided to the current which flows through the material is called volume resistance. For a cube of unit dimensions this is called volume resistivity. This resistivity is  the flow of current resistance offered to the flow of current through the body of the material, and is expressed in the same way as the resistivity of a conducting material. In ohm-m. Thus the volume resistance of an insulating material may be expressed as

            R=ρvd/a

Where ρV IS called the volume resistivity, and is expressed in terms of ohm-m. "d" is length of  the current path through the material in meters, "a" is the cross section area on the current path in square-m.

Surface resistance: The resistance offered by to current I which flows over the surface of insulating material is called surface material. Surface resistivity depends upon the humidity. 


Related Discussions:- Volume resistance and surface resistance

Determine the power absorbed by the circuit, A 20 Ω non-reactive resistor i...

A 20 Ω non-reactive resistor is connected in series with a coil of inductance 80mH and negligible resistance. The combined circuit is connected to a 200V, 50Hz supply. Calcula

Plane transmission grating, Discuss the diffraction of light through n slit...

Discuss the diffraction of light through n slits using plane transmission grating.

Determine the current in the coil and its phase angle, A coil of inductance...

A coil of inductance 159.2mH and resistance 40 is connected in parallel with a 30µF capacitor across a 240V, 50Hz supply. Calculate (a) the current in the coil and its phase ang

Define eddy currents, Define Eddy Currents ? If you try to pull a solid ...

Define Eddy Currents ? If you try to pull a solid piece of some metals (good electrical conductors) quickly between the poles of a strong magnet, you will feel a force pushing

Explain moment of inertia, Explain moment of inertia Moment of inertia ...

Explain moment of inertia Moment of inertia is the term used to calculate or quantify the amount of mass located at an object's extremities. For instance if all the mass of an

What is extrinsic semiconductor, (i) It is also known as impure semiconduct...

(i) It is also known as impure semiconductor. (ii) The phenomena of adding impurity is known as Doping.

Mole, mole; mol The basic SI unit of substance, explained as the amoun...

mole; mol The basic SI unit of substance, explained as the amount of substance which contains as many elementary units (molecules, atoms ions, etc.) as there are atoms in 0.01

What is a p-n junction, What is a P-N junction? How does it behave under fo...

What is a P-N junction? How does it behave under forward and reverse bias?  Describe with the help of circuit diagrams.

Determine the magnitude, Determine the Magnitude The cantilevered beam...

Determine the Magnitude The cantilevered beam shown below has two force couples acting on it as shown.  The value of C1 in Newtons is given in P25.  Determine the magnitude of

Vectors, what is coplaner vactors

what is coplaner vactors

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