Home
Class 12
PHYSICS
The electric field in certain region is ...

The electric field in certain region is acting radially outward and is given by E=Ar. A charge contained in a sphere of radius 'a' centred at the orgin of the field, will be given by:

A

`Aepsilon_0a^2`

B

`4pi epsilon_0Aa^3`

C

`epsilon_0Aa^3`

D

`4pi epsilon_0Aa^2`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • ELECTRONIC DEVICES

    SARAS PUBLICATION|Exercise EXAMPLE|31 Videos

  • MAGNETIC EFFECTS OF CURRENT AND MAGNETISM

    SARAS PUBLICATION|Exercise EXAMPLE|45 Videos

Similar Questions

Explore conceptually related problems

The electric field in a region is radially outward with magnitude E=Aa . Find the charge contained in a sphere of radius a centred at the origin. Take A=100 V m^(-2) and a=20.0 cm .

The electric field in a region is directed outward and is proportional to the distance r from the origin, Taking the electric potential at origin to be zero,

The electric field due to dipole at a point on the equatorial line given by

The electric field in the region between two concentric charged spherical shells

A conducting sphere of radius 20 cm gives a charge of 16 mu C . The electric field at its centre will be :

The electric field vector through a region is given by E =D/X^4hati where, x= length and D = constant. The unit (SI) of D is

A thin conducting ring of radius R is given a change +Q . The electric field at the centre O of the ring due to the charge on the part AKB of the ring is E. The electric field at the centre due to the charge on the part ACDB of the ring is:

The electric field outside a charged long straight wire is given by E=1000/rVm^-1 , and is directed outwards. (a) What is the sign of the charge on the wire. (b) If two points A and B are situated in such a wat that r_A=0.2 m and r_B-0.4 m then. Calculate the value of (V_B-V_A) .

SARAS PUBLICATION-Electrostatics-EXAMPLE
  1. A square current carrying loop is suspended in a uniform magnetic fie...

    Text Solution

    |

  2. A charge Q is enclosed by a Gaussian spherical surface of doubled,the...

    Text Solution

    |

  3. In the Davisson and Germer experiment, the velocity of electrons emitt...

    Text Solution

    |

  4. Four point charges -Q,-q,2q and 2Q are placed , one at each corner of ...

    Text Solution

    |

  5. Monochromatic radiation emitted when electron on hydrogen atom jumps f...

    Text Solution

    |

  6. The electric field associated with an e.m wave in vaccum is given by v...

    Text Solution

    |

  7. What is the flux through a cube of inside a if a point charge of q is ...

    Text Solution

    |

  8. A, B and C are three points in a uniform electric field.The electric p...

    Text Solution

    |

  9. Arbar magnet of length and magnetic dipole moment M is bent in the for...

    Text Solution

    |

  10. A wire loop is rotated in a magnetic field. The frequency of change of...

    Text Solution

    |

  11. An electric dipole of dipole moment p is aligned parallel to a uniform...

    Text Solution

    |

  12. Two thin dielectric slabs of dielectric constants K1 and K2 (K1ltK2) a...

    Text Solution

    |

  13. A parallel plate air capacitor of capacitance Cis connected to a cell ...

    Text Solution

    |

  14. The electric field in certain region is acting radially outward and is...

    Text Solution

    |

  15. If potential( in volts) in a region is expressed as V(x,y,z)=6xy-y+2yz...

    Text Solution

    |

  16. Two idential charged spheres suspended from a common point by two mass...

    Text Solution

    |

  17. The magnetic susceptibility negative for

    Text Solution

    |

  18. A parallel-plate capacitor of area A,plate separation d and capacitanc...

    Text Solution

    |

  19. An electric dipole is placed at an angle of 30 with an electric field ...

    Text Solution

    |

  20. A capacitor is charged by a battery. The battery is removed and anothe...

    Text Solution

    |