Home
Class 12
PHYSICS
The electric field E, current density j ...

The electric field E, current density j and conductivity `sigma` of a conductor are related as

A

`sigma = E//j`

B

`sigma = j//E`

C

`sigma = jE`

D

`sigma = 1//jE`

Text Solution

Verified by Experts

The correct Answer is:
B
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    ERRORLESS |Exercise Kirchhoff s Law, cells|8 Videos

  • CURRENT ELECTRICITY

    ERRORLESS |Exercise Different Measuring Instruments|1 Videos

  • COMMUNICATION SYSTEM

    ERRORLESS |Exercise S E T|14 Videos

  • ELECTRO MAGNETIC INDUCTION

    ERRORLESS |Exercise SET|20 Videos

Similar Questions

Explore conceptually related problems

Current Density In Conductors

Define the term current density of a metallic conductor. Deduce the relation connecting current density (J) and the conductivity (sigma) of the conductor when an electric field E is applied to it.

Knowledge Check

  • Electric field E, current density J and conductivity sigma of a conductor are correlated as per the relation :

    A
    `E = sigma J`
    B
    `E = J/sigma`
    C
    `E = sigma/J`
    D
    `J = E^2 sigma `

  • The electric intesity E, current density j and conductivity sigma are related as:

    A
    `j=sigmaE`
    B
    `j=(E)/(sigma)`
    C
    `jE=sigma`
    D
    `j=sigma^(2)E`

  • The electric intensity E , current density j and specific resistance k are related to each other by the relation

    A
    `E = j lk`
    B
    `E = jk`
    C
    `E = k lj`
    D
    `k = jE`

    • Similar Questions

    Explore conceptually related problems

    Derive the expression for the current density of a conductor in terms of the conductivity and applied electic field. Explain with reason how the mobility of electrons in a conductor changes when the potential difference applied is doubled, keeping the temperature of the conductor constant.

    Column-I gives physical quantities based on a situation in which an ideal cell of e.m.f. V is connected across a cylindrical rod of uniform cross-section area and conductivity ( sigma ) as shown in figure. E, J, phi and i are electric field, current density, electric flux and current through shaded cross-section respectively as shown in figure. Physical quantities in Column-II are equal to those in column I. Match the expression in Column-I with the statements in Column-II.

    Electric field (E) and current density (J) have relation

    The electric intensity at a pont near a charged conductor having a charge density sigma is

    The electric intensity at a point near a charged conductor of surface charge density sigma is

    Home
    Profile