A community for students.
Here's the question you clicked on:
 0 viewing
richyw
 3 years ago
Two identical conducting spheres are places with there centers 0.3m apart. one is given a charge of 12nC and the other a charge of 18nC
a)find the electric charge exerted by one sphere on the other
b)what if the spheres are connected by a conducting wire. Find the electric force each exerts on the other after they have come to equilibrium.
richyw
 3 years ago
Two identical conducting spheres are places with there centers 0.3m apart. one is given a charge of 12nC and the other a charge of 18nC a)find the electric charge exerted by one sphere on the other b)what if the spheres are connected by a conducting wire. Find the electric force each exerts on the other after they have come to equilibrium.

This Question is Closed

richyw
 3 years ago
Best ResponseYou've already chosen the best response.0so is this just a trick question? I mean if they were point charges I would just plug them straight into coulomb's law\[\vec{F_e}=k_e\frac{q_1q_2}{r^2}\hat{r}\]

richyw
 3 years ago
Best ResponseYou've already chosen the best response.0would being a sphere make it any different? I mean could it get more complicated from the charges moving to one side of the sphere to the other and making r smaller? or is there something to say that the exact force is the same as if they were assumed to be point charges. (also assuming that these are completely isolated from other forces) and for b) can I simply "cancel out" the forces and get 6nC and then use the same formula to figure out that force?

richyw
 3 years ago
Best ResponseYou've already chosen the best response.0or wait, would it be 3nC in each one? you'll have to excuse me, it's been a long time since I did intro physics and this is my first course on electricity.

imron07
 3 years ago
Best ResponseYou've already chosen the best response.1This problem use sphere for reasons, i guess. For sphere, from outside of the sphere it can be considered as point charge located at the center. So, yes, you can use Coloumb's force law for (a). (See further: Gauss's law) As for (b): yes, charge will distribute itself uniformly leaving total charge 6nC at surfaces. 3 each.

woleraymond
 3 years ago
Best ResponseYou've already chosen the best response.0i think for a, what do you mean by the electric charge exerted?

imron07
 3 years ago
Best ResponseYou've already chosen the best response.1Hehe, i'm wondering about that too. May be they mean electric force?

richyw
 3 years ago
Best ResponseYou've already chosen the best response.0yeah it must be electric force. thanks a lot!
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.