Recent content by yahoo32

You have a plate capacitor which is grounded on the bottom and is held at a potential V which is then set to 0. You are given the length of the plates and the distances between them. A test charge is brought in with the charge and mass given along with its velocity. For a vanishing magnetic...

That is true, but at the same time they are all being grounded. So you are constantly losing that charge on the outer sphere, no?

Wait a sec, if it is true that once you ground it there is no electric field at R.r2, then that would mean it is also true that when it is NOT grounded there IS an electric field at R>r2, which is not true, according to what I think...

I see, could anyone else provide their opinion? The way I see it, you lose the -Q charge meaning Q enclosed at a distance outside both spheres would be +Q -Q +Q which is equal to Q. Anyone?

Okay, how about the part of the problem where we ground it. Is my reasoning correct for those two electric fields as well?

I am very confused now. There was a portion of this problem I solved before that required EMF to solve because it asked to solve for the charge and the energy stored in the electric field. Maybe the potential difference isn't required for this part?

It is asking to calculate it using Gauss' Law. And after you ground the outer shell, the total charge enclosed at r=20cm is +Q, correct? Wait that new formula you calculated for E, is that really true? That would throw everything off in this last part of the problem?

I see. So is my equation correct for the charge in between the two conducting concentric spheres? Also could you also verify my reasoning for when the outershell is grounded?

Sorry. So Q is given to me. Now would it be true that for the first part the electric field outside the concentric spheres is 0 and between them is equal to E = (+Q)/(4pi*R^2*Epsilon_0)?

We are given Q. I just need to show what the electric field would be in terms of Q. Therefore in between the spheres, as you stated, the electric field would decrease as a function of 1/r^2, correct? Could you state which part of the problem you are referring to? Because once you ground it, the...

anyone?

We have two thin concentric conducting spheres r1 and r2. THe spheres are connected with a power source which supplies emf of epsilon_0. The smaller sphere is connected to the positive pole of the power supply and the larger sphere is connected to the negative pole. Using Gauss Law find the...

Ahhh! So max v = A w . Therefore doubling T and A will keep the max velocity the same, correct?

An ob ject moves with simple harmonic motion. If the amplitude and the period are both doubled, the ob ject’s maximum speed is I believe the object's maximum speed would be halved correct? Considering the regular velocity does not depend on the Amplitude and only the Period would affect it?

I see. Thanks a lot for your help, it really makes sense now!