Home
Class 11
PHYSICS
In Millikan's oil drop experiment. What ...

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.

Text Solution

Verified by Experts

`5.8 cm s^-1,3.9 times 10^-10 N`
Promotional Banner

Topper's Solved these Questions

  • MECHANICAL PROPERTIES OF FLUIDS

    NCERT GUJARATI|Exercise EXERCISE|31 Videos

  • LAW OF MOTION

    NCERT GUJARATI|Exercise EXERCISE (ADDITIONAL EXERCISE)|17 Videos

  • MECHANICAL PROPERTIES OF SOLIDS

    NCERT GUJARATI|Exercise Exercises|16 Videos

Similar Questions

Explore conceptually related problems

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 .

A rain drop of radius 0.3 mm has a terminal velocity in air 1m/s. the viscosity of air is 18xx10^(-5) poise. The viscous force on it is-

If the terminal speed of a sphere of gold (density = 19.5kgm^(-3)) density of liquid =1.5kgm^(-3)) is 0.2ms^(-1) in a viscous liquid . What is the terminal speed of a sphere of silver (density =10.5kgm^(-3)) of the same size in the same liquid ?

If the terminal speed of a sphere of gold (density =19.5kg//m^3 ) is 0.2m//s in a viscous liquid (density =1.5kg//m^3 ), find the terminal speed of a sphere of silver (density =10.5kg//m^3 ) of the same size in the same liquid

Estimate the speed of sound in air at standard temperature and pressure. Athe mass of 1 mole of air is 29.0 xx 10^(-3) kg .

In a hydrogen atom, the electron is moving in a circular orbit of radius 5.3 xx 10^(-11) m with a constant speed of 2.2 xx 10^(6) ms^(-1) . The electric current formed due to the motion of electron is ......

Two narrow bores of diameters 3.00mm and 6.0mm are joined together to form a U-tube open at both ends. If the U-tube contains water, what is the difference in its levels in the two limbs of the tube? Surface tension of water at the temperature of the experiment is 7.3 times 10^-2 N m^-1 .Take the angle of contact to be zero and density to water to be 1.0 times 10^3 kg m^-3

NCERT GUJARATI-MECHANICAL PROPERTIES OF FLUIDS -EXERCISE
  1. Can Bernoulli's equations be used to describe the flow of water throug...

    Text Solution

    |

  2. Does it matter if one uses gauge instead of absolute pressures in appl...

    Text Solution

    |

  3. Glycerine flows steadly through a horizontal tube of length 1.5 m and ...

    Text Solution

    |

  4. In a test experiment on a model aeroplane in a wind tunnel, the flow s...

    Text Solution

    |

  5. Figures 10.23(a) and (b) refer to the steady flow of a (non-viscous) l...

    Text Solution

    |

  6. The cylindrical tube of a spray pump has a cross section of 8.0 cm^2 o...

    Text Solution

    |

  7. A U-shaped wire is dipped in a soap solution, and removed. The thin so...

    Text Solution

    |

  8. Figure 10.24(a) shows a thin liquid film supporting a small weight =4....

    Text Solution

    |

  9. What is the pressure inside the drop of mercury of radius 3.00mm at ro...

    Text Solution

    |

  10. What is the excess pressure inside a bubble of soap solution of radius...

    Text Solution

    |

  11. A tank with a square base of area 1.0 m^2 is divided by a vertical pos...

    Text Solution

    |

  12. A manometer reads the pressure of a gas in an enclosure as shown in fi...

    Text Solution

    |

  13. Two vessels have the same area but different shapes. The first shapes ...

    Text Solution

    |

  14. In deriving Bernoulli's equation, we equated the work done on the flui...

    Text Solution

    |

  15. What is the largest average velocity of blood flow in an artery of rad...

    Text Solution

    |

  16. A plane is in level flight at constant speed and each of its two wing...

    Text Solution

    |

  17. In Millikan's oil drop experiment. What is the terminal speed of an un...

    Text Solution

    |

  18. Mercury has an angle of contact equal to 140^@ with soda lime glass. A...

    Text Solution

    |

  19. Two narrow bores of diameters 3.00mm and 6.0mm are joined together to ...

    Text Solution

    |

  20. It is known that density rho of air decreases with height y as rho=r...

    Text Solution

    |