Home
Class 12
PHYSICS
STATEMENT 1: The current density vec J a...

STATEMENT 1: The current density `vec J` at any point in ohmic resistor is in direction of electric field `vec E` at that point .
STATEMENT 2: A point charge when released from rest in a region having only electrostatic field always moves along electric lines of force.

A

If both Assertion `&` Reason are True `&` the Reason is a correct explanation of the Assertion.

B

If both Assertion `&` Reason are True but Reason is not a correct explanation of the Assertion.

C

If Assertion is True but the Reason is False.

D

If both Assertion `&` Reason are False.

Text Solution

Verified by Experts

The correct Answer is:
C

From relation `vecJ=sigmavecE`, the current density `vecJ` at any point in ohmic resistor is in direction of electric field `vecE` at the point. In space having non-uniform electric field, charges released from rest may not move along ELOF.
Promotional Banner

Topper's Solved these Questions

  • TEST PAPERS

    ALLEN |Exercise PAPER 3|92 Videos
  • TEST PAPERS

    ALLEN |Exercise Part-1 Physics|15 Videos
  • TEST PAPERS

    ALLEN |Exercise MATHS|1 Videos
  • TEST PAPER 4

    ALLEN |Exercise PHYSICS|45 Videos
  • UNIT & DIMENSIONS, BASIC MATHS AND VECTOR

    ALLEN |Exercise Exercise (J-A)|7 Videos

Similar Questions

Explore conceptually related problems

STATEMENT -1 : Induced charge does not contribute to electric field or potential at a give point . STATEMENT -2 : A point charge q_0 is kept outside a solid metallic sphere , the electric field inside the sphere is zero.

Obtain the expression of electric field at any point by continuous distribution of charge on a line.

When a unit positive charge moves from one point to another point in an electric field, work done on it ......

Write the relation between the electric field of an electric charge and electrostatic potential at any point

……………... is the work done in moving a unit positive charge from point A to B in an electric field.

(a) Show that the normal component of electrostatic field has a discontinuity from one side of a charged surface to another given by (E_(2)-E_(1)).n = sigma/epsilon_(0) where hatn is a unit vector normal to the surface at a point and sigma is the surface charge density at that point. (The direction of hatn is from side 1 to side 2.) Hence, show that just outside a conductor, the electric field is sigma hatn //epsilon_(0) . (b) Show that the tangential component of electrostatic field is continuous from one side of a charged surface to another. [Hint: For (a), use Gauss’s law. For, (b) use the fact that work done by electrostatic field on a closed loop is zero.]

A particle having mass m and charge q is , rest. On applying a uniform electric field E it, it starts moving. What is its kinetic energ when it travels a distance y in the direction force ?

A hemisphere is uniformly charged positively. The electric field at a point on a diameter away from the centre is directed

A small electric dipole is placed at origin with its dipole moment directed along positive x-axis. The direction of electric field at point (2, 2sqrt(2), 0) is

ALLEN -TEST PAPERS-PAPER 2
  1. Assertion: A positively charged rod is held near a neutral conducting ...

    Text Solution

    |

  2. Assertion:A point charge q is placed near an arbitrary shaped solid co...

    Text Solution

    |

  3. Assetrion: If a proton and electron are placed in the same uniform ele...

    Text Solution

    |

  4. Assertion:- In a given situation of arrangement of charges, an extra c...

    Text Solution

    |

  5. STATEMENT 1: The current density vec J at any point in ohmic resistor ...

    Text Solution

    |

  6. Assertion:- To cells of unequal emf E(1) and E(2) having internal resi...

    Text Solution

    |

  7. Statement I : In the circuit in Fig. 7.46, both cells are ideal and of...

    Text Solution

    |

  8. Assertion:- Time constants of the cirucits shown in the figure are sam...

    Text Solution

    |

  9. Assertion:- If dipole (vecP(1)) is moved along the line normal to the ...

    Text Solution

    |

  10. Assertion:- Average power consumed in an accircuit is equal to average...

    Text Solution

    |

  11. Assertion:- Electric field produced by changing magnetic field is nonc...

    Text Solution

    |

  12. Assertion (A) : When tiny circular obstacle is placed in the path of l...

    Text Solution

    |

  13. Assertion:- In standard YDSE set up with visible light, the position o...

    Text Solution

    |

  14. Assertion:- In glass, red light travels faster than blue light. Reas...

    Text Solution

    |

  15. Assertion:- When a width of one of the slits of Young's double slit ex...

    Text Solution

    |

  16. Assertion:- The formula ((1)/(v)+(1)/(u)=(1)/(f)) connecting u and v f...

    Text Solution

    |

  17. Assertion:- Paraxial rays are always parallel to the principal axis. ...

    Text Solution

    |

  18. Assertion:- Images formed by TIR (Total internal reflection) are much ...

    Text Solution

    |

  19. Assertion:- The image focus (2^(nd) focus) and the object focus (1^(st...

    Text Solution

    |

  20. Assertion:- If your focus on a point closer to your eyes, the radius o...

    Text Solution

    |