College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

Chapter
Section

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

In Millikan's oil-drop experiment, one looks at a small oil drop held motionless between two plates. Take the voltage between the plates to be 2033 V, and the plate separation to be 2.00 cm. The oil drop (of density 0.81 g/cm3) has a diameter of 4.0 × 10 − 6 m. Find the charge on the drop, in terms of electron units.

To determine

The charge on the drop when a small oil drop held motionless between two plates.

Explanation

Given Data:

Voltage between the plates is2033â€‰V and the plate separation is2cm . The oil has a diameter of4Ã—10âˆ’6m and its density is0.81â€‰g/cm3.

Formula Used:

In Millikan's oil drop experiment, the oil drop is held between the two charged plates and the force due to electric field and gravitational force are in equilibrium.

Thus, we have

FE=FG

Also we have

FE=qE , whereq= charge on oil droplet andE= electric field

AndE=Vd , whereV= voltage andd= separation between the plates.

AndFG=mg , whereg= acceleration due to gravity,m= Mass of droplet

Calculation:

We have

â€ƒâ€ƒFE=FG

â€ƒâ€ƒqVd

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started