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Capa4 - 1[1 point 10 tries Find the capacitance of the...

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1 . [1 point, 10 tries] Find the capacitance of the Earth. Take the mean radius of the Earth to be 6.37×10 6 m. (The outer conductor of the "spherical capacitor" may be considered as a conducting sphere at infinity where V approaches zero.) Answer: 7.09e-04 F 7 2 . [1 point, 10 tries] Regarding the Earth and a cloud layer 927 m above the Earth as the "plates" of a capacitor, calculate the capacitance if the cloud layer has an area of 1.27 km 2 . Assume that the air between the cloud and the ground is pure and dry. Assume that charge builds up on the cloud and on the ground until a uniform electric field with a magnitude of 3.39×10 6 N/C throughout the space between them makes the air break down and conduct electricity as a lightning bolt. What is the maximum charge the cloud can hold? Answer: 3.81e+01 C 7 3 . [1 point, 10 tries] Two capacitors when connected in parallel give an equivalent capacitance of 9.76 pF and an equivalent capacitance of 1.48 pF when connected in series. What is the capacitance of each capacitor? Enter the smaller value first.
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