what is the solution to these questions? A parallel-plate capacitor has 5.00 cm
ID: 1676711 • Letter: W
Question
what is the solution to these questions? A parallel-plate capacitor has 5.00 cm2 plates that are separated by8.00 mm with air between them. If a12.0 V battery is connected to this capacitor, how much energy doesit store?J Consider the parallel-plate capacitor formed by the Earth anda cloud layer. (The cloud layer is 650m above the Earth and has an area of 1.1 km2 = 1.1 x 106 m2.) Assume thiscapacitor will discharge (i.e., produce lightning) when theelectric field strength between the plates reaches 2.9 x 106 N/C. What is the energyreleased if the capacitor discharges completely during a lightningstrike?
J what is the solution to these questions? A parallel-plate capacitor has 5.00 cm2 plates that are separated by8.00 mm with air between them. If a12.0 V battery is connected to this capacitor, how much energy doesit store?
J Consider the parallel-plate capacitor formed by the Earth anda cloud layer. (The cloud layer is 650m above the Earth and has an area of 1.1 km2 = 1.1 x 106 m2.) Assume thiscapacitor will discharge (i.e., produce lightning) when theelectric field strength between the plates reaches 2.9 x 106 N/C. What is the energyreleased if the capacitor discharges completely during a lightningstrike?
J
Explanation / Answer
Area A = 5 cm ^ 2 = 5 * 10 ^-4 m^ 2
Separation d = 8 mm = 8 * 10 ^ -3 m
Voltage V = 12 V
Capacitance C = A / d
Where = permittivity of free space = 8.85 * 10 ^ -12C ^ 2/ N m^ 2
Plug the values we get C = 5.531* 10 ^ -13 F
Energy stored E = ( 1/ 2) C V^ 2
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