voltage on a positively charged object?


by kjamha
Tags: charged, object, positively, voltage
kjamha
kjamha is offline
#1
Jan5-13, 12:11 PM
P: 80
If I charge a van de graaff to say 10,000 V I would think of the voltage as electric pressure. There would be so many electrons looking to escape the metal ball, and this overcrowding of the electrons (electrostatic forces) would create electric pressure, or voltage. If my analogy is off, then the question I have might not make sense and I will have to revise. But I am wondering about an object that has a large deficit of electrons (positively charged). Does this object, just like the van de graaff, have a voltage associated with it? If so, would it be labeled any differently than a negatively charged object?
Phys.Org News Partner Physics news on Phys.org
Physicists design quantum switches which can be activated by single photons
'Dressed' laser aimed at clouds may be key to inducing rain, lightning
Higher-order nonlinear optical processes observed using the SACLA X-ray free-electron laser
mfb
mfb is offline
#2
Jan5-13, 04:11 PM
Mentor
P: 10,830
A different charge density can lead to a voltage difference, but those values are not just proportional to each other - geometry of the charged materials matters, too.
If you remove electrons from an object, its potential increases.
Redbelly98
Redbelly98 is offline
#3
Jan6-13, 07:49 AM
Mentor
Redbelly98's Avatar
P: 11,988
Quote Quote by kjamha View Post
But I am wondering about an object that has a large deficit of electrons (positively charged). Does this object, just like the van de graaff, have a voltage associated with it?
Yes.
If so, would it be labeled any differently than a negatively charged object?
Yes. It's voltage would be labeled with a positive value; the negatively charged object is labeled with a negative value for voltage.

So in your original scenario (with an excess or overcrowding of electrons), the voltage would be -10,000 V (that's negative 10,000).


Register to reply

Related Discussions
Why is H3O positively charged? Chemistry 14
Positively charged plastic rod of length L Introductory Physics Homework 3
Positively charged side with induced emf Introductory Physics Homework 4
Rod A is a positively charged insulator. Introductory Physics Homework 2
positively charged oil drop Introductory Physics Homework 1