Electrospheres/Quiz

< Electrospheres
The Earth is electrically charged and acts as a spherical capacitor. Credit: Natural Resources of Canada.

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

You are free to take this quiz based on electrospheres at any time.

To improve your scores, read and study the lecture, the links contained within, listed under See also and External links, and in the charge ontology and repellor vehicle templates. This should give you adequate background to get 100 %.

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Quiz

Point added for a correct answer:   
Points for a wrong answer:
Ignore the questions' coefficients:

1. Complete the text:

Any capacitor, unless it is altered, has a capacitance.

2. Yes or No, The rate of change of charge depends on the initial value of the charge itself.

Yes
No

3. True or False, If charge is stored, it can also be released by reconnecting the circuit.

TRUE
FALSE

4. True or False, The natural electric field of the Earth starts at its surface and extends inward to the core.

TRUE
FALSE

5. True or False, The natural electric field of the Earth includes the electrosphere.

TRUE
FALSE

6. True or False, The natural electric field of the Earth is caused in part by the solar wind.

TRUE
FALSE

7. 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

8. Yes or No, Cosmic ray ionisation causes a layer of the atmosphere, the electrosphere, to remain highly conductive.

Yes
No

9. 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

10. 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

11. True or False, The natural electric field of the Earth just below the ionosphere reduces to close to a zero gradient.

TRUE
FALSE

12. 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

13. 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

14. Yes or No, A highly conducting layer at which the equipotential condition is reached is called an electrosphere.

Yes
No

15. 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

Your score is 0 / 0

Original research

Hypothesis:

  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.

See also

External links

This is a research project at http://en.wikiversity.org

Educational level: this is a research resource.
Resource type: this resource is a quiz.
Subject classification: this is an astronomy resource.
This article is issued from Wikiversity - version of the Thursday, March 31, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.