Home
Class 12
PHYSICS
What is the diameter of sphere of 4V pot...

What is the diameter of sphere of 4V potential kept near the points situated at same distance from an electron ?

A

`14.4 A^(@)`

B

`7.2 A^(@)`

C

`1.4 A^(@)`

D

`0.7 A^(@)`

Text Solution

Verified by Experts

The correct Answer is:
A, B
`V= (kq)/(r)`
`:. r=(ke)/(V)` ( Electric charge )
`:. 2r = (2ke)/(V) = (2xx9xx10^(9)xx1.6xx10^(-19))/(4)`
`:. "Radius " = 7.2 xx10^(10)m = 7.2 A^(@)`
Promotional Banner

Topper's Solved these Questions

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    KUMAR PRAKASHAN|Exercise Section D ( MCQs asked in Cometitive Exams )|39 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITANCE

    KUMAR PRAKASHAN|Exercise Section C ( NCERT Exemplar Solution ) ( Long Answer Type Questions )|12 Videos

  • ELECTROMAGNETIC WAVES

    KUMAR PRAKASHAN|Exercise BOARD.S QUESTION PAPER MARCH - 2020 (PART - B) SECTION - C|5 Videos

  • MAGNETISM AND MATTER

    KUMAR PRAKASHAN|Exercise SECTION D Multiple Choice Questions (MCQs) (MCQs asked in Competitive Exams) MCQs asked in Board Exam and GUJCET|7 Videos

Similar Questions

Explore conceptually related problems

A particle of mass M is placed at the centre of a spherical shell of same mass and radius a. What will be the magnitude of the gravitational potential at a point situated at a/2 distance from the centre ?

A particle of mass M is situated at the center of a spherical shell of same mass and radius a. The gravitational potential at a point situated at a/2 distance from the centre, will be.......

If the potential at the center of a uniformly charged sphere of radius R is V then electric field at a distance r from the center of sphere will be ( r lt R ) : -

Charge Q is distributed uniformly over a non conducting sphere of radius R. Find the electric p-0tential at distance r from the centre of the sphere r (r lt R) . The electric field at a distance r from the centre of the sphere is given as (1)/(4pi epsilon_(0)). (Q)/(R^(3))hatr . Also find the potential at the centre of the sphere .

If M_(e) is the mass of earth and M_(m) is the mass of moon (M_(e)=81 M_(m)) . The potential energy of an object of mass m situated at a distance R from the centre of earth and r from the centre of moon, will be :-

A hollow metal sphere of radius 5 cm is charged such that the potential on its surface is 10V . The potential at the distance 3 cm from the centre of the sphere is:

The intensity of gravitational field at a point situated at a distance of 8000km form the centre of the earth is 6N//kg . The gravitational potential at that point is -(in joule /kg)

Calculate the solid angle subtended by the periphery of an area of 1 cm^(2) at a point situated symmetrically at a distance of 5 cm from the area.

A narrow parallel beam of light is incident on a transparent sphere of refractive index n if the beam finally gets focused at a point situated at a distance= 2xx("radius of sphere") form the center of the sphere then find n ?

What is meant by saying that the potential difference between two points is 1 V?

KUMAR PRAKASHAN-ELECTROSTATIC POTENTIAL AND CAPACITANCE-Section D ( Multiple Choice Questions (MCQs) )
  1. For a uniform electric field vecE = E(0)(hati), if the electric potent...

    Text Solution

    |

  2. The work done by the charge Q through displacement Delta vecr = a hati...

    Text Solution

    |

  3. What is the diameter of sphere of 4V potential kept near the points si...

    Text Solution

    |

  4. Two spheres or different radii are given equal amount of charge. The ...

    Text Solution

    |

  5. Charges on two spherical shells of radius r(1) and r(2) are same, then...

    Text Solution

    |

  6. Two metallic sphenrs of radil R(1) and R(2) are charged. Now they are ...

    Text Solution

    |

  7. Electric field on surfaces of two spheres of radius r(1) and r(2) are...

    Text Solution

    |

  8. Surface churgc densities on the spheres of radius r(1) and r(2) are s...

    Text Solution

    |

  9. Potenlials of points P and Q are 10V and -4 V respectively. Work done...

    Text Solution

    |

  10. A point P al a certain distance from charge Q has electric potential 6...

    Text Solution

    |

  11. The spheres of radius r and R having charge q and Q respectively on th...

    Text Solution

    |

  12. The spherical shell has radius r. The potential difference V is betwee...

    Text Solution

    |

  13. The radius of a charged hollow sphere is 10 cm. If V is the potential ...

    Text Solution

    |

  14. Electrostatic potential is ...... physical quantity.

    Text Solution

    |

  15. Kinetic energy of a charged particle decreases by 100 J when it is bro...

    Text Solution

    |

  16. Electric potential at 5 can distance from centre of shell of 14 cm rad...

    Text Solution

    |

  17. A particle having mass 1 g and electric charge 10^(-8) C travels from...

    Text Solution

    |

  18. The electric potential due to any point electric dipole varies as .......

    Text Solution

    |

  19. Two charges - q and + q are located at points A(0, 0, - a) and B(0, 0,...

    Text Solution

    |

  20. The dipole moment of a dipole is 4 xx 10^(-9) Cm. The po1ential of a p...

    Text Solution

    |