A metal sphere with radius 1.30 cm is supported on an insulating stand at the center of a hollow, metal, spherical shell with radius rb = 9.50 cm. Charge +q is put on the inner sphere and charge −q on the outer spherical shell. The magnitude of q is chosen to make the potential difference between the spheres 460 V, with the inner sphere at higher potential.

a. Calculate q.
b. Are the electric field lines and equipotential surfaces mutually perpendicular?
c. Are the equipotential surfaces closer together when the magnitude of E rightarrow is largest?
i. Equipotential surfaces closer together when the magnitude E rightarrow of is largest.
ii. Equipotential surfaces closer together when the magnitude E rightarrow of is smallest.

First, launch the video below. you will be asked to use your knowledge of physics to predict the outcome of an experiment. then, close the video window and answer the question at right. you can watch the video again at any point. part a as in the video, we apply a charge +q to the half-shell that carries the electroscope. this time, we also apply a charge –q to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? view available hint(s) as in the video, we apply a charge + to the half-shell that carries the electroscope. this time, we also apply a charge – to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? it deflects more than it did at the end of the video. it deflects the same amount as at end of the video. it does not deflect at all. it deflects less than it did at the end of the video. submit

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