Home
Class 11
PHYSICS
A charge 2 mu C is taken from infinity t...

A charge `2 mu C` is taken from infinity to a point in an electric field, without changing its velocity, if work done against electrostatic forces is `-40 mu J` then potential at that poin is?

Text Solution

Verified by Experts

`V=W_("ext")/(q)=(-40 muJ)/(2 mu C)=-20 V`
Note : Always remember to put sign of W and q.
Promotional Banner

Topper's Solved these Questions

  • MISCELLANEOUS

    ALLEN |Exercise Part -II Example Some worked out Examples|1 Videos

  • MISCELLANEOUS

    ALLEN |Exercise Exercise-01|87 Videos

  • MISCELLANEOUS

    ALLEN |Exercise Question|1 Videos

  • KINEMATICS (MOTION ALONG A STRAIGHT LINE AND MOTION IN A PLANE)

    ALLEN |Exercise BEGINNER S BOX-7|8 Videos

  • PHYSICAL WORLD, UNITS AND DIMENSIONS & ERRORS IN MEASUREMENT

    ALLEN |Exercise EXERCISE-IV|7 Videos

Similar Questions

Explore conceptually related problems

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

1 mu C charge is shifted from A to B and it is found that work done by external force is 80 mu J against electrostic forces, find V_(A)-V_(B)

Answer carefully: (a) Two large conducting spheres carrying charges Q_(1) and Q_(2) are brought close to each other. Is the magnitude of electrostatic force between them exactly given by Q_(1),Q_(2)//4pi epsilon_(0)r^(2) , where r is the distance between their centres? (b) If Coulomb’s law involved 1//r^(3) dependence (instead of would Gauss’s law be still true ? (c) A small test charge is released at rest at a point in an electrostatic field configuration. Will it travel along the field line passing through that point? (d) What is the work done by the field of a nucleus in a complete circular orbit of the electron? What if the orbit is elliptical? (e) We know that electric field is discontinuous across the surface of a charged conductor. Is electric potential also discontinuous there? (f) What meaning would you give to the capacitance of a single conductor? (g) Guess a possible reason why water has a much greater dielectric constant (= 80) than say, mica (= 6).

Statement-1. For a charged particle moving from point P to point Q , the net work done by an electrostatic field on the particle is independent of the path connecting point P to point Q Statement-2. The net work done by a conservative force on an object moving along a closed loop is zero.

In an electric field, electric potential at a point is 10V. How much work has to be done to bring 0.5 C electric charge from infinite distance to that pOint?

A point charge of 0.009 mu C is placed at origin. Calculate intensity of electric field due to this point charge at point (sqrt(2), sqrt(7), 0) .

A sperical ballon od radius R charged uniformly on its surface with surface density sigma . Find work done against electric forces in expanding it upto radius 2R.

2.25 N force is acting on 15 xx 10^(-4) C charge placed at a point in a uniform electric field. So, intensity of this electric field is......

A point P, is 40 m away from charge 2 mu C and 20 m away from charge 4 mu C. Find the electric potential at point P. How much work to be done for a charge ot - 0.4 C brought from infinity to point P ?

2C electric charge Is displaced from a point of electric potential -20 V to some other point. The work done is 200 J, then electric potential of second point V_(2) = ........ volt.

ALLEN -MISCELLANEOUS-Part -II Example
  1. A point charge of 0.009 mu C is placed at origin. Calculate intensit...

    Text Solution

    |

  2. A proton moves with a speed of 7.45xx10^(5) m//s dirctly towards a fre...

    Text Solution

    |

  3. A charge 2 mu C is taken from infinity to a point in an electric field...

    Text Solution

    |

  4. 1 mu C charge is shifted from A to B and it is found that work done by...

    Text Solution

    |

  5. If V=-5x+3y+sqrt(15)z then find magnitude of electric field at point (...

    Text Solution

    |

  6. A system has two charges qA = 2.5 xx 10^(-7) C and q(B) = - 2.5 xx 1...

    Text Solution

    |

  7. Calculate force on a dipole in the surrounding of a long charged wire ...

    Text Solution

    |

  8. A short electric dipole is situated at the origin of coordinate axis w...

    Text Solution

    |

  9. Prove that the frequency of oscillation of an electric dipole of momen...

    Text Solution

    |

  10. Brass has a tensile strength 3.5xx10^(8) N//m^(2). What charge density...

    Text Solution

    |

  11. Prove that if an isolated (isolated means no charges are near the shee...

    Text Solution

    |

  12. If an isolated infinite plate contains a charge Q1 on one of its surfa...

    Text Solution

    |

  13. Three large conducting sheets placed parallel to each other at a finit...

    Text Solution

    |

  14. Two conducting plates A and B are placed parallel to each other. A is ...

    Text Solution

    |

  15. Figure shows three large metallic plates with chrges -Q, 3Q and Q resp...

    Text Solution

    |

  16. An isolated conducting sheet of area A and carrying a charge Q is plac...

    Text Solution

    |

  17. An uncharged conductor of inner radius R(1) and outer radius R(2) cons...

    Text Solution

    |

  18. An unchanged conductor of inner radius R(1) and outer radius R(2) cont...

    Text Solution

    |

  19. When the switch is closed find the charge flown through switch?

    Text Solution

    |

  20. The two conducting spherical shells are joined by a conducting wire an...

    Text Solution

    |