(adsbygoogle = window.adsbygoogle || []).push({}); Milliken Oil Drop Problem anyone??? Help please.

Can some one help me with this Milliken oil drop problem.

Data from a Milliken oil drop experiment are given below. Calculate the value of the charge on an electron from this data:

Voltage needed to suspend drop (V) Drop diameter (microns)

103------ 1.1

44.7----- 1.2

127------ 1.6

175------ 1.5

11.3----- 0.9

Given:

Plate separation: 0.5cm

Density of oil: 0.95 g/mL

Gravitational constant: 9.80 m/s^2

Ok... this is what I did: q=mg/E

1. I calculated for electric field first since: E= kV/m

2. One microns is equal to 10^-6 m

3. I changed volts into kV.

4. I took the average of all 5 of the electric fields and got 67896.71718 kV/m

5. Now I solved for the mass by cubing the plate separation and cancelled it with the mL... to get grams then I changed grams into kilograms to get 1.1875 x 10^-4 kg.

6. And finally I plug everything back into the equation: q=mg/E and get the answer of 2.706 x 10^-8 coulombs.

Please tell me if I did it right.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Super Cool Problem

**Physics Forums | Science Articles, Homework Help, Discussion**