Tag: physics

Questions Related to physics

What is the approximate lightning frequency?

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

  1. 1.4 billion flashes per year

  2. 1.4 billion flashes per month

  3. 1.5 billion flashes per year

  4. 1.6 billion flashes per year

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Correct Option: A
Explanation:

It is estimated that lightning strikes 40-50 times every second, i.e., almost 1.4 billion flashes per year.

What is meant by lightning?

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

  1. It is sudden electrostatic discharge during an electrical storm between electrically charged regions of cloud.

  2. It is sudden electrostatic discharge during an electrical storm between non-electrically charged regions of cloud.

  3. It is unsudden electrostatic discharge during an electrical storm between electrically charged regions of cloud.

  4. None of the above

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Correct Option: A
Explanation:

Lightning occurs when there is a build up of the electrostatic charge in clouds. Regions within the cloud, one builds up a positive whereas other builds up a negative charge.

Lightning is formed in unstable atmospheric zones where there is typically a lot of ____ and ______.

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

  1. Heat, moisture

  2. Heat, vapour

  3. Heat, gas

  4. Heat, lava

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Correct Option: A
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". These type of clouds typically are very dynamic with strong ascending and descending air currents. They are formed in unstable atmospheric zones where there is typically lot of heat and moisture.

The layer of the earth's atmosphere which contains a high concentration of ions and free electrons and is able to reflect radio wave is known as

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

  1. Ionosphere

  2. Stratosphere

  3. Mesosphere

  4. Exosphere

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Correct Option: A
Explanation:

The layer of the earth's atmosphere which contains a high concentration of ions and free electrons and is able to reflect radio wave is known as the ionosphere.

Fill in the blank.
Static electricity produced by charged particles in the atmosphere is known as_______.

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

  1. Atmospheric electricity

  2. Atmospheric charge

  3. Cloud electricity

  4. Wind electricity

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Correct Option: A
Explanation:

Static electricity is an imbalance of electric charges within or on the surface of a material. The charge remains until it is able to move away by means of electric discharge. The static electricity produced by charged particles in the atmosphere is known as atmospheric electricity.

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

Show answer
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.