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

There are $4\times 10^{23}$ atoms in a metal sphere. If one electron is removed from 0.1% atom. what will be the charge on the sphere?

  1. $64C$

  2. $6.4C$

  3. $0.64C$

  4. $-6.4C$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Total atoms = 4 x 10^23. Atoms with an electron removed = 0.1% of 4 x 10^23 = 4 x 10^20. Charge = (number of electrons) x (charge per electron) = (4 x 10^20) x (1.6 x 10^-19 C) = 64 C.

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

Clouds get electrically charged when :

  1. The UV rays of sun falls on them

  2. Air molecules rub against water molecules

  3. Cold currents of air rub against hot currents of air

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The heat from the sun and warm air cause water from water bodies to vaporize. These vapour accumulate in the sky to form clouds. When these vapour molecules rub against the air molecules or other vapour molecules, they acquire charge due to friction.

Lightning occurs when an electrical charge is built up within a cloud, due to static electricity generated by supercooled water droplets colliding with ice crystals near the freezing level. When a large enough charge is built up, a large discharge will occur and can be seen as lightning. The temperature of a lightning bolt can be five times hotter than the surface of the sun. 

Both B and C are correct.
Option D 

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

A lightning rocket is a device used to control 

  1. time and location of a lighting strike.

  2. fuel and location of a lighting strike.

  3. the lighting of the strom

  4. none of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A lightening rocket is a rocket device, about the size of a man, that trails behind a conductor, such as fine copper wire. It is therefore, a conducting lightening rod which is grounded and positioned along side the launch tube in communication with the conductive path to thereby control time and location of a lightening strike from the thundercloud.

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. 
.

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.