- #1
ElPimiento
- 17
- 0
1. Calculate the work that must be done on charges brought from infinity to charge a spherical shell of radius
R = 0.100 m to a total charge of Q = 125 μC.2. [tex]V = k_e\int{\frac{dq}{r}} [/tex][tex]\triangle V = - \int{E \cdot ds} [/tex][tex] W = q\triangle V [/tex]3. I started with assuming the spherical shell produces an electric field equal to that of a point charge, so
[tex] E = k_e \frac{q}{r^2} [/tex]
[tex] V = k_e \frac{q}{r} [/tex] (since they're coming from infinity the initial potential is 0)
But once I get to this point I don't know where to go, I tried sort of just using the fundamental charge for q in
[tex] W = q\triangle V [/tex]
to no success. I also tried a similar method to the aforementioned, where I started by assuming each infinitesimal bit of work could be given by:
[tex] dW = k_e \frac {e}{r} dq [/tex]
But I don't know how to evaluate this as an integral.
So how should I set up this problem?
R = 0.100 m to a total charge of Q = 125 μC.2. [tex]V = k_e\int{\frac{dq}{r}} [/tex][tex]\triangle V = - \int{E \cdot ds} [/tex][tex] W = q\triangle V [/tex]3. I started with assuming the spherical shell produces an electric field equal to that of a point charge, so
[tex] E = k_e \frac{q}{r^2} [/tex]
[tex] V = k_e \frac{q}{r} [/tex] (since they're coming from infinity the initial potential is 0)
But once I get to this point I don't know where to go, I tried sort of just using the fundamental charge for q in
[tex] W = q\triangle V [/tex]
to no success. I also tried a similar method to the aforementioned, where I started by assuming each infinitesimal bit of work could be given by:
[tex] dW = k_e \frac {e}{r} dq [/tex]
But I don't know how to evaluate this as an integral.
So how should I set up this problem?