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

Write the mathematical expression for the refractive index, Write the mathe...

Write the mathematical expression for the refractive index in terms of A and D for a prism, explain the symbols. Mention any two factors on which lateral shift depends.

Decade resistor, DECADE resistors are wire wound resistors. These are wound...

DECADE resistors are wire wound resistors. These are wound on cards moulded on round a switch of low contact resistance. Alloys used for wire are Manganin, minalpha, etc. Bifilar w

Diesel and flat car- inelastic collision, Diesel and Flat Car The anima...

Diesel and Flat Car The animation below portrays the inelastic collision among a extremely massive diesel and a less massive flatcar. Previous to the collision, the diesel is i

Explain radio waves, Radio Waves: Radio waves are electromagnetic waves...

Radio Waves: Radio waves are electromagnetic waves with large range of wavelength from a few millimetres to many meters.

Carrier concentration of metals, derive an expression for density of states...

derive an expression for density of states and hence deduce an expression for carrier concentration of metals

Moment of inertia, define moment of inertia and it''s physical significance...

define moment of inertia and it''s physical significance

Explain infrared waves, Infrared Waves: Infrared wave also known as hea...

Infrared Waves: Infrared wave also known as heat wave. These waves are radiation by hot body at dissimilar temperature.

Explain about the term pumping in laser, Explain about the term pumping in ...

Explain about the term pumping in laser. Pumping in laser is particular criteria to get laser output. It is same to pumping well water to the ground level or to an overhead tan

Special resistor materials: tin, Tin: Atomic number ...

Tin: Atomic number 50 Symbol Sn Atomic weight 118.69 Discovery Known since ancient

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