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Calculate charge and current

  • #1

Homework Statement


The region between concentric conducting spheres is filled with a material with conductivity σ and dielectric constant k. The inner sphere (radius a) is connected to the positive terminal of a battery with emf Vo, and the outer sphere (radius b) is connected to the negative terminal. At t=0 the batter is disconnected.
(a) Calculate Q(t), the charge on the inner conductor, and sketch a plot of this function. Show that the decay constant is kεo/σ.
(b) Calculate I(t).


The Attempt at a Solution


How do I go about this question?
 

Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
25,832
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Hi PhysicsUnderg! :smile:

Hint: what is the electric field between the spheres when the charge is q ? :wink:
 
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