Two thin-walled concentric conducting spheres of radii 5.0 cm and 10 cm have a potential difference of 100 V between them. (k = 1/4??0 = 8.99 × 109 N • m2/C2)

(a) What is the capacitance of this combination?
(b) What is the charge carried by each sphere?


(a) 11 pF (b) 1.1 nC

Physics & Space Science

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Fill in the blank(s) with correct word

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Meters: A galvanometer that gives a full-scale deflection when 150 µA runs through it is used to make an ammeter that reads a maximum of 1.00 A. To do this, a 3.3-m? shunt was required. What is the resistance of just the galvanometer?

Fill in the blank(s) with the appropriate word(s).

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Several surprising discoveries were made as astronomers began detecting exoplanets. Which statement is correct?

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Plasmas are a central part of power generation in

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Physics & Space Science