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

Electric field in the evacuated region of space, The electric potential at ...

The electric potential at a point in a consistent electric field in an evacuated region of space is 4 . 0 volts. The electric potential at a end 25 cm to the east of the first poin

what is excatly phase? , Phase in sinusoidal functions or in waves has two...

Phase in sinusoidal functions or in waves has two different, but closely related, meanings. One is the initial angle of a sinusoidal function at its origin and is sometimes called

Potential energy, Calculate the potential energy of a rock with a mass of 5...

Calculate the potential energy of a rock with a mass of 55 kg while sitting on a cliff that is 27 m high.

Compute the magnitude of the charge, The electric field and electric potent...

The electric field and electric potential at any point because of a point charge kept in air is 20 NC -1 and 10 JC -1 respectively. Compute the magnitude of this charge.

What are half period zones, What do you understand by half period zones? W...

What do you understand by half period zones? What is their other name? Distinguish between physical and geometric (wave) approximations of light.

Motion in one dimension, a body travelling with uniform acceleration crosse...

a body travelling with uniform acceleration crosses two points A &B with velocities 30m/s & 50m/s the speed of the body at mid point of A&B is approximately?

Quantum theory of light, Quantum Theory of Light: Wave theory failed to...

Quantum Theory of Light: Wave theory failed to describe some new effects in 19th century. A German Physicist Max Plank gave theory about the nature of light. 1. Light is emi

Determine the magnitude of the horizontal force, The truss shown below supp...

The truss shown below supports is fastened to the supports at A & E.  Each member of the truss is made of the same uniform material that has a weight in kiloNewtons per metre (kN/m

Define free electron theory, What is the difference among Free Electron The...

What is the difference among Free Electron Theory and Band Theory of solids? Free Electron Theory: This theory says that, metals conduct electricity due to the presence of

Combination of resistance, Combination of Resistance: In electric circu...

Combination of Resistance: In electric circuits the resistors are interlinked in two ways. Resistance in Series Resistance in Parallel

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