Tag: some natural phenomena

Questions Related to some natural phenomena

Which of the following is safest way to protect yourself from lightning?

physics some natural phenomena transfer of charge lightning safety seismic waves and tsunami

  1. Run to an open field

  2. Open an umbrella for cover

  3. Take shelter under trees

  4. Squat low on ground

Show answer
Correct Option: D
Explanation:

Squat low on ground is safest way to protect yourself from lightning.

A lightning conductor is made up of:

physics some natural phenomena transfer of charge lightning safety seismic waves and tsunami

  1. copper

  2. glass

  3. ebonite

  4. wood

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Correct Option: A
Explanation:

The main attribute common to all lightning rods is that they are all made of conductive materials, such as copper and aluminum. Copper and its alloys are the most common materials used in lightning protection. 
A lightning conductor is a metal rod or strap connecting the highest point on a building to the earth. Its purpose is to protect the building from a damaging discharge of electricity between the atmosphere and the building, that is, a lightning strike. 

Which of the following is the best thing to do during heavy lightning ?

physics some natural phenomena transfer of charge lightning safety seismic waves and tsunami

  1. Lying on the ground in an open place

  2. Going into the nearest water body

  3. Staying indoors away from metallic doors or windows

  4. Standing under a tall tree

Show answer
Correct Option: C

When you touch a charged body, the charge flows through you into the earth. This is called

physics some natural phenomena transfer of charge lightning safety seismic waves and tsunami

  1. induction

  2. conduction

  3. capacitance

  4. earthing

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Correct Option: D
Explanation:

$Answer:-$ D
when a wire  connecting circuit is connected to earth than it is known as earthing, if you touch circuit actually you behave like that wire and entire charge passes through your body and you will feel shock. Human body is good conductor of electricity. 

Lightning occurs because of :

physics some natural phenomena transfer of charge lightning safety seismic waves and tsunami

  1. rain

  2. electric discharge

  3. wind

  4. shaking of earth

Show answer
Correct Option: B
Explanation:

Answer is B.

Lightning occurs because of electric discharge.
Lightning is one of the most powerful natural forces on the planet. It is a natural discharge of the static electricity built up in storm clouds. Most lightning is formed as a part of thunderstorms. We know from observation of static electricity that static electrical discharges such as lightning are caused by separation of charges into positive and negative ions. Over time more of one charge builds until its natural attraction to the opposite charge causes it to migrate in an electrical discharge.

Which of the following is safest way to protect yourself from lightning?

physics some natural phenomena transfer of charge lightning safety seismic waves and tsunami

  1. To run to an open field.

  2. To open an umbrella for cover.

  3. To take shelter under a tree.

  4. To squat low on ground.

Show answer
Correct Option: D
Explanation:

Though none of the given options show a perfect way of protection against lightning, squating low on ground is a better choice from the remaining options. Squating low on ground decreases surface area of body open to the atmosphere. So, chances of getting struck is less as compared to other cases.

State whether the given statement is True or False :
Lightning strikes more on small buildings as compared to larger one.

physics some natural phenomena transfer of charge lightning safety seismic waves and tsunami

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

Tall buildings and monuments are frequently hit by lightning. We should always avoid being the highest object anywhere or taking shelter near or under the highest object, including tall trees. We should avoid being near a lightning rod or standing near metal objects such as a fence or underground pipes.

State whether given statement is True or False.
Does lightning always strike the tallest object?

physics some natural phenomena transfer of charge lightning safety seismic waves and tsunami

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

Lightning strike in initiated very high in thunderstorm clouds. Objects on ground have very little influence on its travelling path. Conceptually the taller object is more susceptible to lightning because of shorter air gap between lightning stroke and object.

Can the lightning rods be made of any material?

physics some natural phenomena transfer of charge lightning safety seismic waves and tsunami

  1. Yes

  2. No. It can only be made of metals.

  3. No. It can be made with any type of bodies with neutral charge

  4. None of these

Show answer
Correct Option: B
Explanation:

It should be of metallic object so that it can conduct the charge. Any material wont be able to conduct charge.

Lightning rod can be most effective if it draws charge from lowest cloud by method of contact. This statement is True/ False?

physics some natural phenomena transfer of charge lightning safety seismic waves and tsunami

  1. True

  2. False

Show answer
Correct Option: B
Explanation:

There is no need to contact cloud to discharge those. Strong electric fields provides the pathway between cloud and lightning rod.