Home
Class 12
PHYSICS
An oil drop of 12 exess electrons is h...

An oil drop of 12 exess electrons is held stationary under a constant eletric field of `2.55 xx10^(4) NC^(-1)` the density of the oil is 1.26 g `cm^(-3)` estimage the radius of the drop (g=9.81 m `s^(-2) e =1.60 xx10^(-19)` C)

Text Solution

Verified by Experts

(a) zero ,(b) zero (c ) 1.9 N/C
Promotional Banner

Topper's Solved these Questions

  • ELECTRIC CHARGES AND FIELDS

    NCERT GUJARATI|Exercise EXERCISES|34 Videos

  • DUAL NATURE OF RADIATION AND MATTER

    NCERT GUJARATI|Exercise EXERCISES|41 Videos

  • ELECTROMAGNETIC INDUCTION

    NCERT GUJARATI|Exercise ADDITIONAL EXERCISES|7 Videos

Similar Questions

Explore conceptually related problems

An oil drop of 12 excess electrons is held stationary under a constant electric field of 2.55 xx 10^4 NC^(-1) . (Millikan's oil drop experiment). The density of the oil is 1.26 g cm^(-3) . Estimate the radius of the drop, (g = 9.81 ms^(-2), e = 1.60 xx 10^(-19 C)) .

An electron falls freely in electric field of 9.1 xx 10^3 NC^(-1) , then acceleration of electron is .......

In a chamber, a uniform magnetic field of 6.5 G (1 G = 10^(-4) T) is maintained. An electron is shot into the field with a speed of 4.8 x× 10^6 m s^(-1) normal to the field. Explain why the path of the electron is a circle. Determine the radius of the circular orbit. (e = 1.5 x× 10^(-19) C, m_e = 9.1x×10^(-31) kg)

An electron is moving in a circular path under the influence of a transverse magnetic field of 3.57xx10^(-2)T . If the value of e/m is 1.76xx10^(11)C/(kg) , the frequency of revolution of the electron is

In Millikan's oil drop experiment , what is the terminal speed of an uncharged drop of radius 2.0xx10^(-5)m and density 1.2xx10^(3)kgm^(-3) . Take the viscosity of air at the temperature of the experiment to be 1.8xx10^(-5) Pa.s . How much is the viscous force on the drop at that speed ? Neglect buoyancy of the drop due to air .

An electric dipole with dipole moment 4 xx 10^(-9) Cm is aligned at 30° with the direction of a uniform electric field of magnitude 5 xx 10^4 NC^(-1) . Calculate the magnitude of the torque acting on the dipole.

In Millikan's oil drop experiment. What is the terminal speed of an uncharged drop of radius 2.0 times 10^-5 m and density 1.2 times 10^3 kg m^-3 . Take the viscosity of air at the temperature of the experiment to be 1.8 times 10^-5 Pa s . How much is the viscosity force on the drop at that speed? Neglect buoyancy of the drop due to air.

NCERT GUJARATI-ELECTRIC CHARGES AND FIELDS -EXERCISES
  1. Consider a uniform electric field E=3xx10^(3) hati N/C (a) what is ...

    Text Solution

    |

  2. What is the net flux of the uniform electric field of exercise th...

    Text Solution

    |

  3. Careful measurement of the electric field at the surface of a black b...

    Text Solution

    |

  4. A point charge + mu c is a distance 5 cm directly above the centre of...

    Text Solution

    |

  5. A point charge of 2.0 mu c is at the centre of a cubic gaussian ...

    Text Solution

    |

  6. A point charge causes an elelctric flux of -1.0 xx10^(3) Nm^(2) /C to...

    Text Solution

    |

  7. A conducting sphere of radius 10 cm has an unknown charge if the elect...

    Text Solution

    |

  8. A uniformly charged conducting sphere of 2.4 m diameter has a (a)...

    Text Solution

    |

  9. An infinite line charge produces a field of 9xx10^(4) N/C at a dis...

    Text Solution

    |

  10. Two large thin metal plates are parallel and close to each other on...

    Text Solution

    |

  11. An oil drop of 12 exess electrons is held stationary under a consta...

    Text Solution

    |

  12. Which among the curves cannot possibly represent electrostatic fie...

    Text Solution

    |

  13. In a certain region of space electric field is along the z direction...

    Text Solution

    |

  14. (a) a conductor a with a cavity given a charge Q show that the enti...

    Text Solution

    |

  15. A hollow charged conductor has a tiny hole cut in to its surface sho...

    Text Solution

    |

  16. Obtain the formula for the electric field due to a long thin wire ...

    Text Solution

    |

  17. It is now established that protons and neutrons are themselves bui...

    Text Solution

    |

  18. (a) consider an arbitrary electrostic field configuration a small tes...

    Text Solution

    |

  19. A particle of mass m and charge enters the region between the two char...

    Text Solution

    |

  20. Suppose that the particle in exercise in 1.33 an electron projecrt...

    Text Solution

    |