Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

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 newton's colour disc light and the formation of shadows physics

How many colours comprises white light?

  1. infinite

  2. seven

  3. three

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

White light comprises of seven colours- Violet, Indigo, Blue. Green, Yellow, Orange , Red. 

So, when white light consisting  of seven colors falls on a transparent medium (glass prism) , each color in it is refracted ( or deviated ) by a different angle , with the result that seven colors are spread out to form a spectrum, The red color is deviated least , so it forms the upper part of the spectrum . On the other hand, violet color is deviated the maximum, so violet appears at the bottom of the spectrum.

Multiple choice newton's colour disc light and the formation of shadows physics

Monochromatic light is that light in which :

  1. yellow and red light is present

  2. various wavelengths are present

  3. red and violet light is present

  4. single wavelength is present
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Chromatic is something related to color. So "monochromatic" means a single color, which means light of single wavelength. 
Hence correct answer is D.

Multiple choice newton's colour disc light and the formation of shadows physics

Which of the following sources of light is different from others ?

  1. Sunlight

  2. White light

  3. Light from a bulb

  4. Sodium light
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

$Answer:-$ D option

Sunlight,white light , light from bulb when passed from prism will split into its constituent colours,i.e. spectrum will be seen.
But when sodium light is passed it will not show colour band since it is a monochromatic light(light having only one constituent colour).