Recent content by Fanman22

Three very large sheets are separated by equal distances of 20.0 cm (Fig. 22-42). The first and third sheets are very thin and nonconducting and have surface charge densities of +6.50 µC/m2 and -6.50 µC/m2, respectively. The middle sheet is conducting but has no net charge...

I'm calling it a Gauss's Law problem because that is what we are "learning" right now...learning as in our professor assigned the chapter and went on vacation one hour later.

I wish there was a web counter of how many times I have been to that site today. I think my main problem is that I'm not sure on what geometry my object is. Is it a conducting cylinder? or a cylinder with uniform charge density. It doesn't seem to fall into either of these categories.

sorry...totally lost now.

Its not working out...this is what I did: For b.) r= 0.065m c.d = Q1/A = (-3.8e-6 N/C)/(pi*0.065m)^2 = -2.9e-4 E= c.d/(2*pi*epsilon*0.065m) E= -8.09e7...but sadly, it doesn't. :confused:

i think the equation I have is correct, but I'm not sure where the given net charges fit in or when to use which one. Maybe I have to use the -3.8uC to calculate the charge density for the 6.5cm radius and use the 2.2uC to calculate the c.d for the 10.5cm radius?

picture is kinda small, but R1 is radius of the small cylinder (0.05m) and R2 is the radius of the large cylinder (0.09m)

A thin cylindrical shell of radius R1 = 5.0 cm is surrounded by a second cylindrical shell of radius R2 = 9.0 cm, as in Fig. 22-34. Both cylinders are 3.0 m long. The inner one carries a total charge of Q1 = -3.8 µC. The outer one carries a total charge of Q2 = +2.2 µC. (Assume the positive...

damn, I tried that earlier because it seemed like as you got further and further away, the sheet would appear small (like a pt charge)...only problem was...I forgot to square the 20m

A flat square sheet of thin aluminum foil, 25 cm on a side, carries a uniformly distributed -36 nC charge. What is the approximate electric field at the following positions? a.)0.01m above surface? b.) 20m above the sheet? For a.), I used E=chargedensity/(2)epsilon. From my...

I'm an 8th semester senior majoring in Neurobiology and Molecular and Cell Biology. I took my calculus sequence in my 1st and 2nd semesters of college. 3 years later, I find myself finishing up a general physics sequence that is beginning to require the use of calculus. Needless to say...

thanks, everything came out correct.

I'm not sure if I'm going about this correctly. Just for your reference, Plate 1 has a E of -2.82e4, Plate 2 an E of 1.13e4, and Plate 3 an E of -1.69e4... Let's take point B: I am considering fields to the left to be negative and to the right to be positive. Plate 1 will be a negative...

ok, but would point B, for example, be influenced by the charge density on the 3rd plate? If so, I am assuming that i should draw the diagram with arrows and add up all arrows in one direction and subtract all arrows in the opposite direction.

Three very large square planes of charge are arranged as shown (on edge) in Fig. 21-70. From left to right, the planes have charge densities per unit area of -0.50 µC/m2, +0.20 µC/m2, and -0.30 µC/m2. Find the total electric field (direction and magnitude) at the points A, B, C, and D. Assume...