# electrcity

1. ### Capacitance and induced charge of a spherical Capacitor + dielectric

I) For the first part I used: $V = - \int E ds = \int_a^c \frac{1}{4\pi\epsilon_0} Q /r^2 dr+ \int_c^{c+d} \frac{1}{k} \frac{1}{4\pi\epsilon_0} Q /r^2 dr + \int_{c+d}^b \frac{1}{4\pi\epsilon_0} Q /r^2 dr$ And by using $C = Q/V$ We get an answer which is somehow large for writing here...

28. ### Could nothing happen when fork in socket

Hi right now I do not have school but I was thinking about what my chemistry teacher said last year. he was telling us about electrons and how they move from negative to positive. he said something along the line of: lets you would put a fork in a wall socket and by chance you first hit the...