physics

posted by .

In the Millikan oil drop experiment, an atomizer (a sprayer with a fine nozzle) is used to introduce many tiny droplets of oil between two oppositely charged parallel metal plates. Some of the droplets pick up one or more excess electrons. The charge on the plates is adjusted so that the electric force on the excess electrons exactly balances the weight of the droplet. The idea is to look for a droplet that has the smallest electric force and assume that it has only one excess electron. This strategy lets the observer measure the charge on the electron. Suppose we are using an electric field of 3.0 104 N/C. The charge on one electron is about 1.6 10-19 C. Estimate the radius of an oil drop of density 774 kg/m3 for which its weight could be balanced by the electric force of this field on one electron. (This problem courtesy of E.F. Reddish.)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    a.What electric potential difference exists across a 5.2 µF capacitor that has a charge of 2.1 10-3 C?
  2. Physics

    Millikan's oil drop experiment suspended a charged oil drop in an electric field. By measuring the size of the drop and using the oil's density, the weight of each drop could be calculated. This allowed the charge of each drop to be …
  3. Physics

    Question: Based on Millikan's Oil Drop Experiment, what can you conclude about the existence of a smallest unit of electric charge, of which other charges are multiples?
  4. Chemistry

    In 1909, Robert Millikan performed an experiment involving tiny, charged drops of oil. The drops were charged because they had picked up extra electrons. Millikan was able to measure the charge on each drop in coulombs. Here is an …
  5. PHYSICS

    In the early 1900s, Robert Millikan used small charged droplets of oil, suspended in an electric field, to make the first quantitative measurements of the electron’s charge. A 0.67-um-diameter droplet of oil, having a charge of +e, …
  6. physics

    a positively charged light metal ball is suspended between two oppositely charged metal plates on an insulating thread. after being charged once. the plates are disconnected from the battery. describe the behavior of the ball. (the …
  7. Chemistry

    In 1909, Robert Millikan performed an experiment involving tiny, charged drops of oil. The drops were charged because they had picked up extra electrons. Millikan was able to measure the charge on each drop in coulombs. Here is an …
  8. physics

    8 1/2 HRS ON THIS MASTERING PHYSICS WOW n 1909, Robert Millikan was the first to find the charge of an electron in his now-famous oil-drop experiment. In that experiment tiny oil drops were sprayed into a uniform electric field between …
  9. physics

    1909, Robert Millikan was the first to find the charge of an electron in his now-famous oil-drop experiment. In that experiment tiny oil drops were sprayed into a uniform electric field between a horizontal pair of oppositely charged …
  10. physics

    An oil drop is stationary within an electric field of 490 V/m that is set up between two parallel plates. If the volume of the oil drop is 4 X 10 (-19) m3, how many excess electrons does it carry?

More Similar Questions