Home
Class 12
PHYSICS
If vec j= current density, vecE=electric...

If `vec j`= current density, `vecE`=electric field and `sigma`=conductivity, then the vector form of ohm's law is:

A

`vec j=sigma vecE`

B

`vec j=vecE/sigma`

C

`sigma=vecj.vecE`

D

`sigma= vecjxxvecE`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • MODEL PAPER SET-13

    UNITED BOOK HOUSE|Exercise EXERCISE|29 Videos

  • MODEL PAPER SET-15

    UNITED BOOK HOUSE|Exercise EXERCISE|39 Videos

Similar Questions

Explore conceptually related problems

Obtain for the expression from drift velocity the vector form of ohm’s Law.

The electric field intensity E, current density J and conductivity delta are related as—

The direction of the intensity of the electric field at a point on the perpendicular bisector of an electric dipole ( vec(p) = electric dipole moment ) is

If an electric dipole of moment vecp be placed along a uniform electric field of intensity vecE , the torque acting on the dipole is

If an electric dipole of moment vecp be placed along a uniform electric field of intessity vecE , the torque acting on the dipole is

Express Coulomb's in electrostatics in vector form . What is the importance of this vector form of the law ?

State Biot-Savart's law and express this law in the vector form.

If the equation of an electric field is vec(E ) = (y hat(i) + xhat(j)) , then the equation of electric potential is represented by

Write down the Biot - Savart law in the vector form. Hence find the magnetic field intensity in magnitude and direction at the centre of a circular coil carrying a current.

UNITED BOOK HOUSE-MODEL PAPER SET-14-EXERCISE
  1. The inward and outward flux are phi1 and phi2 respectively then the c...

    Text Solution

    |

  2. Two capacitors of capacitance C1 and C2 are connected in series and a ...

    Text Solution

    |

  3. If vec j= current density, vecE=electric field and sigma=conductivity,...

    Text Solution

    |

  4. A proton and alpha particle is projected with the same velocity within...

    Text Solution

    |

  5. For a long wire in the circular shape the magnetic field at the centre...

    Text Solution

    |

  6. The equation for ac current is i=I1 sin wt+I2cos wt . What is the valu...

    Text Solution

    |

  7. The number of turns in primary and secondary coil of a transformer is ...

    Text Solution

    |

  8. For which electromagnetic wave the range of wavelength is 10^(-10) m

    Text Solution

    |

  9. The relation between angle of the prism and refractive index of the me...

    Text Solution

    |

  10. If U.V. light is incident on any medium then no photoelectric emissio...

    Text Solution

    |

  11. The ground state energy of H1^1,atom is -13.6eV. What is the energy fo...

    Text Solution

    |

  12. The range of suitable radio wave frequency for transmitting sky wave i...

    Text Solution

    |

  13. What will happen to the energy of light when it travels from rarer to ...

    Text Solution

    |

  14. If p type and n type crystals are touched with each other can p-n junc...

    Text Solution

    |

  15. Why do we prefer a potentiometer with longer wire?

    Text Solution

    |

  16. An electron is rotating with constant speed of 6 xx 10^7 m//s in a con...

    Text Solution

    |

  17. In a metal maximum magnetic permittivity is0.126 Tm//A, What will be ...

    Text Solution

    |

  18. Why any object get heated easily in microwave if it has moisture in it...

    Text Solution

    |

  19. The electron in a hydrogen atom is in n=2 state. When it drops to the ...

    Text Solution

    |

  20. Write down two importances of modulation for signal transferring

    Text Solution

    |