ZuoTi.Pro
Question

Millikan Experiment 4

Consider an oil droplet of mass m andcharge q. We want to determine the charge on thedroplet in a Millikan-type experiment. We will do this in several steps. Assume, for simplicity, that the charge is positive and that the electric field betweenthe plates points upward.

Oil has a density rho of 860;{rm kg}/{rm m}^{3}. An oildroplet is suspended between two plates 1.0; rm cm apart by adjusting the potential difference between them to 1177; rm V. When the voltage is removed, the droplet falls and quickly reaches constant speed. It is timed with a stopwatch andfalls 3.00; rm mm in 7.33; rm s. The viscosity of air is 1.83 times 10^{ - 5};rm kg/ m cdot s. What is the droplet's charge q?Express the charge in coulombs to two significant figures. Take the free-fall acceleration to be 9.81; rm m/s^2.
science   physics   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1
densityof oil ρ = 860kg/m3viscosity of air isη = 1.83*10-5kg/mspotenial difference V= 1174vseperation betweenthe plates d = 0.90*10-2mthevelocity of the oil drop isv = 0.00306m/7.40s=4.135*10-4m/s sothe electric field between the plates is E = V/d caculatefor Eacceleration due to gravity g = 9.8m/s2we havethe formula for the radius of the drop asa ˜ [9ηv/2gρ]1/2caculate foranow theformula for the charge on the drop isEq ˜ 4/3*πa3ρgor q = 4πa3ρg / 3Ecaculate for q we getthe droplet's charge
answered by: Dr Ajit Handa
0 4
Add a comment
Know the answer?
Add Answer to:
Millikan Experiment 4
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • Millikan Experiment 2

    Consider an oil droplet of mass andcharge . We want to determine the charge on thedroplet in a Millikan-type experiment. We will do this in several steps. Assume, for simplicity, that the charge is positive and that the electric field betweenthe plates points upward.The field is easily determined by knowing thespacing between the plates and measuring the potential difference applied to them. The larger problem is to determine the mass of a microscopic droplet. Consider amass falling through a viscous...

  • In the early 1900s, Robert Millikan used small charged droplets of oil, suspended in an electric...

    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 0.74-μm-diameter droplet of oil, having a charge of +e+e, is suspended in midair between two horizontal plates of a parallel-plate capacitor. The upward electric force on the droplet is exactly balanced by the downward force of gravity. The oil has a density of 860 kg/m3, and the capacitor plates are 6.0 mm...

  • Question 3 (3 points) In a Millikan Oil-Drop type experiment, oil drops with an excess charge...

    Question 3 (3 points) In a Millikan Oil-Drop type experiment, oil drops with an excess charge of two electrons are suspended between the two plates. If the mass of the oil drop is one million times the mass of the proton, and the plates are 2.5 cm apart, what is the voltage of the upper plate relative to that of the lower plate? Assume a uniform field between the two plates.

  • a) An oil droplet with a mass of 7.20 x 10-16 kg is moving upward at...

    a) An oil droplet with a mass of 7.20 x 10-16 kg is moving upward at a constant speed of 2.0 m/s between two horizontal charged plates. If the electric field strength between the plates is 2.20 x 104 V/m what is the charge on the oil droplet? Express your answer in the format of a.bc x 10-de C b) In a Millikan-type experiment, two horizontal charged plates are 2.5 cm apart. A latex sphere of 1.3 x 10-15 kg...

  • In 1909, Robert Millikan was the first to find the charge of an electron in his...

    In 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 plates. The drops were observed with a magnifying eyepiece, and the electric field was adjusted so that the electric force on some negatively charged oil drops was just sufficient to balance their weight. Millikan accurately measured the charges on many oil...

  • To analyze the experiment used to determine the properties of an electron. In 1909, Robert Millikan...

    To analyze the experiment used to determine the properties of an electron. 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 example of what his data may have looked like. In Millikan's experiment, the charge on each drop of oil was measured in coulombs. Imagine the same experiment, but with...

  • Oil Drop 11. Robert Millikan received a Nobel Prize for determining the charge on the electron....

    Oil Drop 11. Robert Millikan received a Nobel Prize for determining the charge on the electron. To do this, he set up a of oil between potential difference between two horizontal parallel metal plates. He then sprayed drops the plates and adjusted the potential difference until drops of a certain size between the plates, as shown above. Suppose that when the potential difference adjusted until the electric field is 10,000 N/C downward, a certain drop with a mass of remains...

  • 1. A small droplet of oil with a mass of 2.00 x 10-15 kg is given...

    1. A small droplet of oil with a mass of 2.00 x 10-15 kg is given a small excess charge and is then held suspended in a region of uniform electric field directed upward with a magnitude of 6125 N/C. a) Is the excess charge positive or negative? b) How many elementary charges (unbalanced electrons or protons) are on the oil droplet? Note: this is the famous Millikan Oil Drop Experiment. Millikan took into account the air friction and buoyancy...

  • In 1909, Millikan performed a famous experiment in which he measured the charge of the electron...

    In 1909, Millikan performed a famous experiment in which he measured the charge of the electron (and for which he won the Nobel prize). In his experiment, oil drops carrying excess electrons are made to float between two charged large parallel, horizontal plates, as shown, by adjusting a uniform vertical electric field between the plates so that the drops do not fall down. Suppose each drop has a mass of 3.3 × 10−15kg, and one of the drops floats (the...

  • for the Millikan Oil drop experiment with the elect r thee o ano drop with charge...

    for the Millikan Oil drop experiment with the elect r thee o ano drop with charge q falls dowctrih with charge q falls down thros br where b is the moving oil drop 2 Miken Ol Drep speed of s For simplicity we assume the drag force is |DI constant associated with the viscous liquid and v is the speed of qE 9 moilg D2 (a) Field Off (b) Field On 20. Assuming the drag constant is b the mass...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT