Tag: advanced of lightning

Questions Related to advanced of lightning

Fill in the blank
________ is pattern of electrical charges in Earth's atmosphere.

physics some natural phenomena how lightning occurs? the story of lightning advanced of lightning

  1. Electricity

  2. Space electricity

  3. Ground electricity

  4. Atmospheric electricity

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Correct Option: D
Explanation:

Atmospheric electricity is the pattern of electrical  charges in Earth's atmosphere. Atmospheric electricity refers to electricity that exists in the atmosphere as a result of natural phenomenon. 

The Earth's surface, the ionosphere and the atmosphere is known as :

physics some natural phenomena how lightning occurs? the story of lightning advanced of lightning

  1. global atmosphere electrical circuit

  2. local atmosphere electrical circuit

  3. electrical circuit

  4. none of these

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Correct Option: A
Explanation:

The normal movement of electric charges among the Earth's surface, the various layers of atmosphere and especially the ionosphere, taken together are known as Global atmosphere electric circuit.

Ionosphere extends from about 80 to 1,000 km :

physics some natural phenomena how lightning occurs? the story of lightning advanced of lightning

  1. above the earth's surface

  2. above the sea's surface

  3. below the sea's surface

  4. none of the above

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Correct Option: A
Explanation:

The ionosphere is the ionised part of earth's upper atmosphere. It is the layer that extends from about $80$ to $1000$ Km above the earth's surface.

Fill in the blank.
_______is most commonly caused by charge separation in cumulonimbus clouds, or thunderheads.

physics some natural phenomena how lightning occurs? the story of lightning advanced of lightning

  1. Strom

  2. Lightning

  3. Cyclone

  4. Hurrican

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Correct Option: B
Explanation:

Lightening is an extremely high voltage, high current, transient electrical discharge. It is most commonly caused by charge separation in cumulonimbus clouds or thunderheads. 

The normal movement of electric charges among the Earth's surface, the various layers of the atmosphere, and especially the ionosphere, taken together, are known as :

physics some natural phenomena how lightning occurs? the story of lightning advanced of lightning

  1. the global atmospheric electrical circuit

  2. a current conducting circuit

  3. charge cloud

  4. none of the above

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Correct Option: A
Explanation:

Atmospheric electricity is the pattern of electrical charges in the earth's atmosphere. The normal movement of electric charges among the earth's surface, the various layers of the atmosphere, and especially the ionosphere, taken together, are known as the global atmospheric electrical circuit.
Much of the reasoning required to explain these currents lies within the field of electrostatics, but also requires understanding of other disciplines within Earth science.

The intensity of the atmospheric electric field is, normally,

physics some natural phenomena how lightning occurs? the story of lightning advanced of lightning

  1. greater in the middle of the day than at morning

  2. smaller in the middle of the day than at morning

  3. same in the middle of the day as at morning

  4. zero in the middle of the day and at morning

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Correct Option: A
Explanation:

The fine day net positive charge sets up an electric field between the negative earth and the net positive charge in the air and this electric field stores electrical energy. The positive charge acts by induction on the earth and electromagnetic devices.

The explanation for atmospheric electricity mainly lies in the field of

physics some natural phenomena how lightning occurs? the story of lightning advanced of lightning

  1. electromagnetism

  2. electrostatics

  3. current electricity

  4. All of the above

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Correct Option: B
Explanation:
The phenomenon of atmospheric electricity is observed mainly explained by the presence of static charges in various object. The neutralisation effect of these charges can be seen as atmospheric electricity. And the study of static charges is known as electrostatics

Which of the following is an example of atmospheric electricity?

physics some natural phenomena how lightning occurs? the story of lightning advanced of lightning

  1. Auroras

  2. Lightening

  3. Ionospheric currents

  4. All of the above

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Correct Option: D
Explanation:
Examples of atmospheric electricity
(a) Auroras $\rightarrow$ appearance of streamer of reddish light in the sky, especially near northern or southern magnetic pole.
(b) Lightning
(c) Ionospheric currents

When there is lightning and 
a) You are in a jungle ,go under a tall tree.
b) You are in a jungle,go under a canopy of small trees and bushes.
c) You are out in the open,crouch on your feet,do not stand up or lie on the ground.
d) You are in an open field,stay there rather than go inside a completely covered building.Of these the good strategies are :-  

physics some natural phenomena how lightning occurs? the story of lightning advanced of lightning

  1. B and C

  2. A and C

  3. A,B and C

  4. A,C and D

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Correct Option: A
Explanation:

When there is lightning and you are in a jungle, its better to go under a canopy of small trees and bushes. The electric field is strongest near the pointed tip of an electrical conductor, and so isolated trees often make for great targets for lightning strikes. Canopy of small trees delocalises charge concentration on the other hand. 

Standing out in a field far from trees may also pose risks too as it makes you  the tallest object around and may be a target for lightning strikes. The idea will be to crouch low so that you are not the tallest object around, and at the same time keep your feet close together with your heels touching. This will help the electricity to go in one foot and out the other.

The intensity of atmospheric electric field is :

physics some natural phenomena how lightning occurs? the story of lightning advanced of lightning

  1. same in winter as in summer

  2. lesser in winter than in summer

  3. greater in winter than in summer

  4. none of the above

Show answer
Correct Option: C
Explanation:
Experiments have shown that the intensity of the electric field is greater in the middle of the day than at morning or night and is also greater in winter than in summer, which is totaly based on 'Fine weather' theory.