Recent content by dharm0us

Supposing I am a frequent mountain climber who encounters rains in 40% of the treks, what measures could I take to prevent myself being struck by lightening? Isn't the probality of my getting struck with the lightning just too high, assuming that most of the mountains "do not" have a...

Hi Phrak, What I have proposed is this : Initially there is no charge on the outer surface of the plate, and the surface charge density on the inner surface is Sigma. When the dielectric is inserted, the charge density on the inner surface is = Sigma / K, where K is the dielectric...

Hi Phrak, So, is the reasoning in my original post is correct?

Hi Bob S, Let me rephrase my question : When a dielectric is inserted, some charge is induced on the inside of the plate, so the opposite charge of equal amount will be induced on the outside of the plate. Is it correct? Actually, I am making a question, to be handed out to students...

Let me know if the following reasoning is correct : If the surface charge density on the internal surface of one of the plates in a parallel plate capacitor is Sigma, which becomes Sigma/K, when a dielectric material is inserted between the plates with dielectric constant...

thanks. your answer gave me a good pointer. I could find some other links too : http://www.google.co.in/search?q=water+electricity+conductor&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a

Higher dielectric constant means better insulator. Water has a dielectric constant of 8, which is enormous(according to Walter Lewin), but it still is a very good conductor of electricity, why?