Some Natural Phenomena Test

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Some Natural Phenomena Test - 26

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Weekly Quiz Competition

Question 1
1 / -0

Waves produced due to the earthquake are known as

A
seismic waves

B
shock waves

C
infrasonic waves

D
Tectonic waves

Solution

Events like, tectonic plate movement, underground explosion or volcanic explosion can produce tremors on the surface of earth. The tremors produce waves on the surface of the earth which are capable of covering large distances. These are called seismic waves.
Question 2
1 / -0

The lightning rod should be taller than the building with a pointed top end.

A
True

B
False

C
Ambigious

D
Data insufficient

Solution
Question 3
1 / -0

Which of the following four persons will stand the minimum risk of getting struck by lightning?

A
A person holding umbrella.

B
A person squatting low on the ground.

C
A person riding a bicycle.

D
A person standing in an open field.

Solution
Question 4
1 / -0

Fill in the blank:

Air is a/an ________ conductor of electricity.

A
Good

B
Poor

C
Extremely good

D
Neutral

Solution

Normally air is a poor conductor of electricity as molecules are very loosely bound to each other and there is ample space between molecules.
Question 5
1 / -0

Opening up of strips of an electroscope is an indication of:

A
Proximity of a conductor.

B
Proximity of a charged body.

C
Proximity of an uncharged body.

D
Earth connection.

Solution

When a charged body comes close to an electroscope, charges are induced to the electroscope. These charges flow down to the metal strips which open up due to repulsion for having similar charges.
Question 6
1 / -0

If lightning strikes you, why would you feel electric shock?

A
Because charges are in motion

B
Because of heating effect of current

C
Because of magnetic effect

D
Both a & b

Solution

Electric shock occurs when a person comes in direct contact with any source of electric current. As lightning is basically charges in motion, the moving charges in the lightning pass through our body acting as a conductor, consequently giving us an electric shock.
Question 7
1 / -0

When, on large scale, negative and positive charges meet in clouds, we experience:

A
streak of bright light and sound

B
thunderstorm

C
lighting

D
all of the above

Solution

Positive and negative charges accumulate on the surfaces of the clouds. There is accumulation of positive charges near the ground also. When the magnitude of the accumulated charges becomes very large, the air which is normally a poor conductor of electricity, is no longer able to resist their flow. Negative and positive charges meet, producing streaks of bright light and explosive sound. We see that streaks as lightning and hear the sound of thunderstorms.
Question 8
1 / -0

The objects which acquires small electric charges, when rubbed with each other, are called:

A
electric objects

B
charged objects

C
neutral objects

D
none of the above

Solution

In the process of rubbing objects with one another, both acquire small electric charges. These objects are called charged objects.
Question 9
1 / -0

Why is a car or a bus safe place during lightening?

A
Because it does not rain inside the bus.

B
Because lightening cannot travel through the glass.

C
Because a car or a bus is insulated from the Earth.

D
None of the above.

Solution

A car or a bus is safe during lightning because the lightning will travel around the surface of the vehicle and then go to ground. The metallic frame of the car, being a good conductor, would direct the current around the objects and discharge it safely to the ground while shielding the objects inside the car.
Question 10
1 / -0

Tremors on the earth can also be caused when?

A
Valcano erupts

B
Metero hits the earth

C
Underground nuclear explosion

D
All of the above

Solution

Tremors on the earth are majorly caused by earthquakes. Tremors on the earth can also be caused when a volcano erupts, or a meteor hits the earth or an underground nuclear explosion.

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Re-Attempt Weekly Quiz Competition

Some Natural Phenomena Test - 26

Result

Some Natural Phenomena Test - 26

Score

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Rank

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SHARING IS CARING

Question 1

seismic waves

shock waves

infrasonic waves

Tectonic waves

Solution

Question 2

True

False

Ambigious

Data insufficient

Solution

Question 3

A person holding umbrella.

A person squatting low on the ground.

A person riding a bicycle.

A person standing in an open field.

Solution

Question 4

Good

Poor

Extremely good

Neutral

Solution

Question 5

Proximity of a conductor.

Proximity of a charged body.

Proximity of an uncharged body.

Earth connection.

Solution

Question 6

Because charges are in motion

Because of heating effect of current

Because of magnetic effect

Both a & b

Solution

Question 7

streak of bright light and sound

thunderstorm

lighting

all of the above

Solution

Question 8

electric objects

charged objects

neutral objects

none of the above

Solution

Question 9

Because it does not rain inside the bus.

Because lightening cannot travel through the glass.

Because a car or a bus is insulated from the Earth.

None of the above.

Solution

Question 10

Valcano erupts

Metero hits the earth

Underground nuclear explosion

All of the above

Solution

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