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

Magnitude of the acceleration, A car travels along a horizontal circular cu...

A car travels along a horizontal circular curved road that has a radius of 600 m. If the speed is uniformly increased at a rate of 2000 km>h2, determine the magnitude of the accele

Which is equal to work, Work is equal to which of the following? a) T...

Work is equal to which of the following? a) The cross product of force and displacement. b) The product of force times time c) Force divided by time d) The dot

Role of magnetic field in generating ultrasonic waves, Role of Magnetic fie...

Role of Magnetic field in generating ultrasonic waves Magnetic field is applied parallel to the length of a ferromagnetic rod made of material as like iron or nickel, a small e

Multimode - step-profile fibre, A multimode, step-profile fibre has a core ...

A multimode, step-profile fibre has a core radius of 50 microns, a core index of 1.52 and a cladding index of 1.50.  (a) If the fibre end-face is excited by a source with a wave

Sound problem, A Decibel meter reads 140 dB for a sound source at 20''c at...

A Decibel meter reads 140 dB for a sound source at 20''c at 60 % relative humidity. It also records sound pressure for 140 dB as 200 pascals what will it read( decibel meter) at 4

Estimate the kinetic energy of a proton, A cyclotron with dee radius 45.9 ...

A cyclotron with dee radius 45.9 cm is operated at an oscillator frequency of 12.9 MHz to accelerate protons. (a) What magnitude B of magnetic field is required to achieve resonanc

Explain right hand rule, Right hand Rule: James clark Maxwell proposed ...

Right hand Rule: James clark Maxwell proposed a rule to search the direction of magnetic lines of force around a wire carrying current.  This rule states. "If a current carr

What is a linear charge density, What is a linear charge density? Ans...

What is a linear charge density? Answer: Note that the respond In the case of a distribution of charge in which all the charge is on a line it is the total amount of char

What is sarah horizontal acceleration, Alfonso and Sarah like to go sky div...

Alfonso and Sarah like to go sky diving together. Alfonso has a mass of 88 kg, and Sarah has a mass of 66 kg. While in free fall together, Alfonso pushes Sarah horizontally with a

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