Draft:Electrospheres/Quiz

The lecture and article on electrospheres is part of a series on the geophysics of the Earth.

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Quiz
{Complete the text: Any capacitor, unless it is { physically (i) } altered, has a { constant (i) } capacitance.
 * type="{}"}

{Yes or No, The rate of change of charge depends on the initial value of the charge itself. + Yes - No
 * type=""}

{True or False, If charge is stored, it can also be released by reconnecting the circuit. - TRUE + FALSE
 * type=""}

{True or False, The natural electric field of the Earth starts at its surface and extends inward to the core. - TRUE + FALSE
 * type=""}

{True or False, The natural electric field of the Earth includes the electrosphere. + TRUE - FALSE
 * type=""}

{True or False, The natural electric field of the Earth is caused in part by the solar wind. + TRUE - FALSE
 * type=""}

{True or False, The natural electric field of the Earth has a negative charge at the surface of the Earth and a positive charge at the ionosphere. + TRUE - FALSE
 * type=""}

{Yes or No, Cosmic ray ionisation causes a layer of the atmosphere, the electrosphere, to remain highly conductive. + Yes - No
 * type=""}

{True or False, The natural electric field of the Earth has a gradient of the about 200 volts/meter just above the Earth's surface. + TRUE - FALSE
 * type=""}

{True or False, The natural electric field of the Earth has a gradient of the about 200 volts/meter just below the Earth's surface. - TRUE + FALSE
 * type=""}

{True or False, The natural electric field of the Earth just below the ionosphere reduces to close to a zero gradient. + TRUE - FALSE
 * type=""}

{True or False, An approximately 5,000 kg vehicle would need at least 3,300 Coulombs of charge (probably negative) stored onboard to be repelled by the Earth's surface. + TRUE - FALSE
 * type=""}

{True or False, To rise above the Earth's surface a 5,000 kg vehicle with 3,300 Coulombs aboard would have to dissipate charge. - TRUE + FALSE
 * type=""}

{Yes or No, A highly conducting layer at which the equipotential condition is reached is called an electrosphere. + Yes - No
 * type=""}

{True or False, A 5,000 kg vehicle with say 4,000 Coulombs of negative charge aboard would probably have to dissipate charge to land on the Earth's surface. + TRUE - FALSE
 * type=""}

Hypotheses

 * 1) Charge can be acquire or dissipated into the atmosphere at sufficient speeds to allow landing and take-off without collisional effects of a repellor vehicle.