Some Natural Phenomena Test

Result

Some Natural Phenomena Test - 16

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Weekly Quiz Competition

Question 1
1 / -0

What should be the length of the metal rod used as lightning conductor?

A
Shorter than the walls of the building.

B
Same length or equals.

C
Taller than the walls of the building.

D
Nothing specific, can be of any length.

Solution

Lightning conductors can protect buildings from the effects of lightning. A metallic rod, taller than the building, is installed in the walls of the building during its construction. One end of the rod is kept out in the air and the other is buried deep in the ground. The rod provides an easy route for the transfer of electric charge to the ground.
Question 2
1 / -0

________ is the indication to rush for safer place.

A
Thunder

B
Rain

C
Clouds

D
All of the above

Solution

Hearing thunder is an alert to rush to a safer place. It could be dangerous to be out during thunderstorm as there is a possibility of lightning strikes during thunderstorms.
Question 3
1 / -0

During lightning which of the following is not a safe place?

A
In car

B
Bus stop

C
Inside a house

D
Open field

Solution

Lightning gets attracted towards the tallest target, on open field you will be the tallest target as compared to surroundings so it is a dangerous place for you.
Question 4
1 / -0

If you are travelling by car during thunderstorm which place is safe?

A
Under a tree

B
Near street light

C
Elevated places

D
None of the above

Solution

It is better to remain in the car, as it provides earthing to charges without harming us. The metal body of the car conducts the charges to the earth without letting it enter our body.

The chances of lightning striking a high-rise object are more. So we should never stand near a tower, a building, or a tree, etc.
Question 5
1 / -0

Why it is not recommended to touch water metal-pipe lines, electric wires during thunderstorm?

A
They are good conductors thus may carry charges.

B
They are insulators and never carry charges.

C
They may store charges.

D
This is a myth.

Solution

Metal pipe-lines for carrying water and electrical wires are good conductors and carry charges. If a lightning strikes the building, there may be chance of electric shocks getting spread through those due to leakage and this could be dangerous for life.
Question 6
1 / -0

During lightning, the _______ provides an easy route for the transfer of _______ charges to the ground.

A
Metallic rod, only positive

B
Plastic rod, only negative

C
Metallic rod, electric

D
Plastic rod, electric
Question 7
1 / -0

What happens when the lower end of the lightning conductor is not properly buried in the ground?

A
No earthing

B
Building are protected

C
Damage to building and even life

D
Both a & c

Solution

A lightning conductor taller than the building, is installed in the walls of the building during its construction. One end of the rod is kept out in the air and the other is buried deep in the ground to provide an easy route for the transfer of electric charge to the ground.
Earthing is important to protect building from lightning. If proper earthing is not provide than it can damage building and dangerous for life also.
Question 8
1 / -0

Why should the height of lightning conductor is more than that of the walls of the building?

A
Lightning get attracted towards the tallest target

B
Lightning get repelled

C
Lightning get attracted by the walls of building

D
None of the above

Solution

Tall structures on the ground, like buildings, provide a channel for the lightning to discharge into the ground. That's why lightning conductors should be taller than the building.
Question 9
1 / -0

When you are in forest during lightning which is safe place?

A
Open field

B
Under tall trees

C
Under short trees

D
None of the above

Solution

Lightning get attracted towards the tallest target, in forest it is good idea to take shelter under short trees to protect yourself from lightning.
Question 10
1 / -0

To provide proper earthing, lower end of the lightning conductor should be

A
buried deep into the ground

B
slightly buried into the ground

C
only touching the ground lightly

D
a few inches above the ground

Solution

To provide proper earthing, the lower end of the lightning conductor should be buried deep into the ground. Then the charges carried into the Earth will not be leaked on the surface of the Earth.

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Re-Attempt Weekly Quiz Competition

Some Natural Phenomena Test - 16

Result

Some Natural Phenomena Test - 16

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SHARING IS CARING

Question 1

Shorter than the walls of the building.

Same length or equals.

Taller than the walls of the building.

Nothing specific, can be of any length.

Solution

Question 2

Thunder

Rain

Clouds

All of the above

Solution

Question 3

In car

Bus stop

Inside a house

Open field

Solution

Question 4

Under a tree

Near street light

Elevated places

None of the above

Solution

Question 5

They are good conductors thus may carry charges.

They are insulators and never carry charges.

They may store charges.

This is a myth.

Solution

Question 6

Metallic rod, only positive

Plastic rod, only negative

Metallic rod, electric

Plastic rod, electric

Question 7

No earthing

Building are protected

Damage to building and even life

Both a & c

Solution

Question 8

Lightning get attracted towards the tallest target

Lightning get repelled

Lightning get attracted by the walls of building

None of the above

Solution

Question 9

Open field

Under tall trees

Under short trees

None of the above

Solution

Question 10

buried deep into the ground

slightly buried into the ground

only touching the ground lightly

a few inches above the ground

Solution

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