Home
Class 12
PHYSICS
The electric intensity E, current densit...

The electric intensity E, current density 'j' and conductivity `sigma` are related as

A

`j=sigma E`

B

`j=(E )/(sigma)`

C

`jE=s`

D

`j=sigma^(2)s`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    FULL MARKS|Exercise Additional Questions Solved (Fill in the blanks)|39 Videos
  • CURRENT ELECTRICITY

    FULL MARKS|Exercise Additional Questions Solved (Match the following)|4 Videos
  • CURRENT ELECTRICITY

    FULL MARKS|Exercise TEXTBOOK EVALUATION (Numerical Problems)|15 Videos
  • COMMUNICATION SYSTEMS

    FULL MARKS|Exercise ADDITIONAL QUESTIONS  (Additional problems)|3 Videos
  • DUAL NATURE OF RADIATION AND MATTER

    FULL MARKS|Exercise ADDITIONAL QUESTIONS -( ADDITIONAL NUMERICAL PROBLEMS : )|10 Videos

Similar Questions

Explore conceptually related problems

Define current density.

The unit of current density is _______

Relation between current density and drift velocity is _______

The relationship between Current density J, conductivity o and Electric field intensity E is:

Define electrical conductivity.

What is meant by electric current ?

Electric field intensity and electric potential are related by _______

FULL MARKS-CURRENT ELECTRICITY-Additional Questions Solved (Choose the correct answer)
  1. A 10 m long wire of resistance 20Omega is connected in series with a b...

    Text Solution

    |

  2. The resistivity of a wire

    Text Solution

    |

  3. The electric intensity E, current density 'j' and conductivity sigma a...

    Text Solution

    |

  4. For which of the following dependences of drift velocity v(d) on elect...

    Text Solution

    |

  5. A cell has an emf of 1.5V. When short circuited, it gives a current of...

    Text Solution

    |

  6. Three resistance, each of 1Omega, are joined in parallel. Three such ...

    Text Solution

    |

  7. Constantan is used for making standard resistance because it has

    Text Solution

    |

  8. Kirchhoff's two laws for electrical circuits are magnifestations of th...

    Text Solution

    |

  9. The resistance R(o) and R(t) of a metallic wire at temperature 0^(@)C ...

    Text Solution

    |

  10. A cell of emf 2V and internal resistance 0.1 Omega is connected with a...

    Text Solution

    |

  11. A flow of 10^(7) electrons per second in a conduction wire constitutes...

    Text Solution

    |

  12. Sensitivity of a potentiometer can be increased by

    Text Solution

    |

  13. Potential gradient is defined as

    Text Solution

    |

  14. n equal resistors are first connected in series and then in parallel. ...

    Text Solution

    |

  15. A galvanometer can be converted into a voltmeter by connecting

    Text Solution

    |

  16. The reciprocal of resistance is ……………………….. .

    Text Solution

    |

  17. A student has 10 resistors, each of resistance r. The minimum resistan...

    Text Solution

    |

  18. The drift velocity of electrons in a wire of radius r is proportional ...

    Text Solution

    |

  19. Kirchoff'slaw i.e., sum i=0, at a junction, deals with the conservatio...

    Text Solution

    |

  20. The resistance of a material increases with temperature. It is a

    Text Solution

    |