Home
Class 12
PHYSICS
A tiny spherical oil drop carrying a net...

A tiny spherical oil drop carrying a net charge q is balanced in still air with a vertical uniform electric field of strength `(81pi)/(7)xx10^5Vm^-1`. When the field is switched off, the drop is observed to fall with terminal velocity `2xx10^-3ms^-1`. Given `g=9.8ms^-2`, viscoisty of the air `=1.8xx10^-5Nsm^-2` and the denisty of oil `=900kg m^-3`, the magnitude of q is

A

`1.6xx10^(-19) C`

B

`3.2 xx 10^(-19) C`

C

`4.8 xx 10^(-19)C`

D

`8.0xx10^(-19) C`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ELECTROSTATICS

    RESONANCE|Exercise Part - II|23 Videos

  • ELECTROSTATICS

    RESONANCE|Exercise HLP|39 Videos

  • ELECTROSTATICS

    RESONANCE|Exercise Part - IV|9 Videos

  • ELECTROMAGNETIC INDUCTION

    RESONANCE|Exercise A.l.P|19 Videos

  • EXPERIMENTAL PHYSICS

    RESONANCE|Exercise PART -II|10 Videos

Similar Questions

Explore conceptually related problems

The terminal velocity of a rain drop is 30cm//s . If the viscosity of air is 1.8xx10^(-5)Nsm^(-2) .The radius of rain drop is

An oil drop falls through air with a terminal velocity of (5xx10^(-4))/(sec) viscosity of air is 1.8xx10^(-5)(N-s)/(m^(2)) and density of oil is 900 kg m^(3) neglect density of air as compared to that of oil.

If an oil drop of weight 3.2xx10^(-13) N is balanced in an electric field of 5xx10^(5) Vm^(-1) , find the charge on the oil drop.

A rain drop of radius 0.5 mm has a terminal velocity in air 2 ms^(-1) . The viscosity of air is 18 xx 10^(-5)" dyne "cm^(-2)s . Find the viscous force on the rain drop.

Find the terminal velocity of a rain drop of radius 0.01 mm. The coefficient of viscosity of air is 1.8xx10^-5 N-sm^-2 and its density is 1.2kgm^-3 .Density of water =1000kgm^-3 . Take g=10ms^-2

A rain drop of radius 0.3 mm falls through air with a terminal viscosity of 1 m s^(-1) . The viscosity of air is 18 xx 10^(-5) poise. The viscous force on the rain drop is

Find the manitude of a charge whose electric field strength is 18 xx 10^(3) N C^(-1) at a distance of 5 m in air .

A negatively charged oil drop is prevented from falling under gravity by applying a vertical electric field of 100Vm^(-1) . If the mass of the drop is 1.6xx10^(3)g the number of electrons carried by the drop is (g=10ms^(-2))

RESONANCE-ELECTROSTATICS-Exercise - 3 Part - I
  1. A few electric field lines for a system of two charges Q(1) and Q(2) f...

    Text Solution

    |

  2. A uniformly charged thin spherical shell of radius R carries uniform s...

    Text Solution

    |

  3. A tiny spherical oil drop carrying a net charge q is balanced in still...

    Text Solution

    |

  4. Conisder an electric field vecE=E0hatx where E0 is a constant . The ...

    Text Solution

    |

  5. A spherical metal shell A of radius RA and a solid metal sphere B of r...

    Text Solution

    |

  6. A wooden block performs SHM on a frictionless surface with frequency, ...

    Text Solution

    |

  7. Which of the following statement(s) is/are correct ?

    Text Solution

    |

  8. Conisder a thin spherical shell of radius R with centre at the origin,...

    Text Solution

    |

  9. Six point charges are kept at the vertices of a regular hexagon of sid...

    Text Solution

    |

  10. Two non-conducting solid spheres of radii R and 2R, having uniform vol...

    Text Solution

    |

  11. Two non-conducting spheres of radii R1 and R2 and carrying uniform vol...

    Text Solution

    |

  12. Charges Q, 2Q and 4Q are uniformly distributed in three dielectric sol...

    Text Solution

    |

  13. Let E1(r), E2(r) and E3(r) be the respectively electric field at a dis...

    Text Solution

    |

  14. Four charges Q(1), Q(2), Q(3) and Q(4) of same magnitude are fixed alo...

    Text Solution

    |

  15. An infinity long uniform line charge distribution of charge per unit l...

    Text Solution

    |

  16. The figure below depict two situations in which two infinitely long st...

    Text Solution

    |

  17. Consider a uniform spherical charge distribution of radius R(1) centr...

    Text Solution

    |

  18. A point charge +Q is place just outside an imaginary hemispherical sur...

    Text Solution

    |

  19. An infinitely long thin non-conduction wire is parallel to the z-axis ...

    Text Solution

    |

  20. A particle of mass 10^(-3) kg and charge 1.0 c is initially at rest At...

    Text Solution

    |