Tag: the story of lightning

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Questions Related to the story of lightning

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

Atmospheric electricity is generated due to 

  1. the accumulation of static charges

  2. the accumulation of moving charges

  3. the destruction of static charges

  4. destruction of moving charges
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The presence of electrical action is the atmosphere, due to the accumulation of enormous static charges generated by friction of air upon itself, can be accounted for the generation of atmospheric electricity i.e, lightening and thunderstorms. 

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

The theory of atmospheric electricity explains which of the following phenomena?

  1. Free electricity causes thunderstorms

  2. Current due to a charge

  3. The high temperature causes people

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Atmospheric electricity is the study of electrical charges in the Earth's atmosphere (or that of any planet). One of the phenomenons that is a result of this is that free electricity causing thunderstorm.
Multiple choice physics some natural phenomena how lightning occurs? the story of lightning advanced of lightning

Static charges in the atmosphere is generated by

  1. induction from the earth's surface

  2. conduction between clouds

  3. friction of the air upon itself

  4. No reason
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The accumulation of enormous static charges in the atmosphere is generated by the friction of air upon itself. Such accumulation of static charges in the atmosphere can be the cause of atmosphere electricity. 
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Multiple choice physics some natural phenomena how lightning occurs? the story of lightning advanced of lightning

Atmospheric electricity was discovered by

  1. Isaac Newton

  2. Michael Faraday

  3. Benjamin Franklin

  4. Thomas Edison
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Atmospheric electricity is the study of electrical charges in the earth's atmosphere. Benjamin Franklin discovered it. His experiments showed that electrical phenomenon of atmosphere were not fundamentally different from those produced in the laboratory by listing many similarities between electricity and lighting. 

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

State whether the given statement is True or False :

Lightning conductor always develops the opposite charges as is the charge in the clouds.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lightening conductor always develops the opposite charges as in the charge in the clouds. This statement is true. Because according to the lightening dissipative theory, which states that as a cloud approaches a building, there is a conductive pathway established between the statically charged cloud and lightening rod. The charge induced by the cloud on lightening rod is opposite to that  on the cloud. According to this theory, static charges gradually migrate along this pathway to the ground, thus reducing the explosive discharge.

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

State whether the given statement is True or False :

Lightning conductor cannot protect a building from lightning.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Answer is False.

The use of a lightning rod on a building protects the building by preventing the lightning strike. The idea is based upon the principle that the electric field strength is great around a pointed object. The intense electric fields surrounding a pointed object serve to ionize the surrounding air, thus enhancing its conductive ability. 
As a storm cloud approaches, there is a conductive pathway established between the statically charged cloud and the lightning rod. The static charges gradually migrate along this pathway to the ground, thus reducing the likelihood of a sudden and explosive discharge. 
The primary role of a lightning rod is to discharge the cloud over a longer length of time, thus preventing the excessive charge buildup that is characteristic of a lightning strike.
Hence, lightning conductor is a device to protect a building against lightning.

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

Fill in the blanks:

During the development of a thunder-storm, the air currents move ________ while the water droplets move _______.

  1. downward, upward

  2. upward, downward

  3. downward, downward

  4. upward, upward
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Thunder-storm occurs due to vigorous movements of air currents upward and water droplets downward. This leads to separation of charges.

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

It is safer to use mobile and cordless phone during lightning because?

  1. They are wireless

  2. Less chances of getting in contact with lightning

  3. Both a & b

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lightning can travels through the wires or cords of telephone giving electric shock to you but use of mobile and cordless phones are safe.