Some Natural Phenomena Test

Result

Some Natural Phenomena Test - 30

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

If $${ 10 }^{ 9 }$$ electrons move out of a body to another body every second, then the time required to get a total charge of $$1C$$ on the other body is then

A
$$250$$ years

B
$$100$$ years

C
$$198$$ years

D
$$150$$ years

Solution

The charge given out on one second
$$=1.6\times { 10 }^{ -19 }C\times { 10 }^{ 9 }=1.6\times { 10 }^{ -10 }C\quad $$
Time requried to accumulate a charge of $$1C$$
$$=\cfrac { 1 }{ 1.6\times { 10 }^{ -10 } } =6.25\times { 10 }^{ 9 }s=198$$ years
Question 2
1 / -0

If the Richter scale reading for an earthquake is less than 3.5 then what can you say about the earthquake?

A
Generally not felt but recorded

B
Often felt & rarely causes damage

C
Major earth quake causes serious damage

D
Causes major damage to poorly constructed buildigs

Solution

Really destructive earthquakes have magnitudes higher than 7 on the Richter scale. Earthquakes with magnitude 4 or less rarely cause any damage.
Question 3
1 / -0

Spark produced in sky during a thunderstorm are called

A
Lightning

B
Electric current

C
Both A and B

D
None of these

Solution

Spark produced in sky is due to charges that build up in clouds and when these charges are discharged during a thunderstorm, it is called lightining.
Question 4
1 / -0

Following are precautions one must take in case a storm is accompanied by lightning.
i) Do not take shelter under a tree.
ii) Do not take shelter under an umbrella with a metallic end.
iii) Do not take shelter in open garages, storage sheds, etc.
iv) Do not take shelter in a bus in the open.
Which one of these is not correct?

A
(i)

B
(ii)

C
(iii)

D
(iv)

Solution

As we know that buses are made up of metals from outside and hence when the lighting strikes the bus it would have no effect on inside , and it does not matter what lighting does to the outside part of the bus, but for extra knowledge the real reason is lighting is a static electricity and it is different from the electricity in our home and as far as I am concerned lighting has no effect on inside of a hollow closed conductor but has effect outside and hence car is a hollow conductor and closed too , so it would have no effect.
Question 5
1 / -0

When a glass rod is rubbed with dry silk cloth, the charge acquired by the silk cloth is

A
Positive

B
Negative

C
Both positive and negative

D
none of the above

Solution

When a glass rod is rubbed with dry silk cloth, the charge acquired by the silk cloth is negative .
Question 6
1 / -0

Two objects when rubbed together, get charged. The charges on them are:

A
Equal and opposite

B
Equal and similar

C
Unequal and similar

D
Unequal and opposite

Solution

Two objects when rubbed together get charged. One body losses some electrons and becomes positively charged and the other body gains electrons and becomes negatively charged.
So when two objects rubbed together, get charged. The charges on them are equal and opposite.
Question 7
1 / -0

When an ebonite rod is rubbed with fur, the rod acquires

A
positive charge

B
negative charge

C
no charge

D
none of the above

Solution

On rubbing the ebonite rod with fur electrons move from fur to the ebonite rod and hence ebonite gets a negative charge.
Question 8
1 / -0

What are the weak zones around the boundaries of plates underneath Earth, which are prone to slide and cause earthquakes?

A
Fault zone

B
Eruption zone

C
Explosive zone

D
Sliding zone

Solution

Earthquakes are caused by the movement of plates, the boundaries of the plates are the weak zones where earthquakes are more likely to occur. The weak zones are also known as seismic or fault zones.
Question 9
1 / -0

Where is the lower end of a lightning conductor fixed in the building?

A
at the top

B
at a window

C
at the base

D
in the ground

Solution

A lightning conductor is a device used to protect buildings from the damaging effect of lightning.

Lightning conductor consists of a metallic rod, taller than the building, which 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 lower end is buried deep in the ground.

Hence, if lightning hits the building, it will strike the rod and be conducted to ground through wire.
Question 10
1 / -0

What happens when two bodies are rubbed together?

A
They get equal charged but the same nature

B
They get equal charged but the opposite nature

C
Nothing happend with rubbing

D
None

Solution

When two bodies are rubbed together there will be a transfer of electrons from one body to the other body. The body losing electrons acquires a positive charge and the body receiving electrons acquires an equal amount of negative charge.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Some Natural Phenomena Test - 30

Result

Some Natural Phenomena Test - 30

Score

-

Rank

-

SHARING IS CARING

Question 1

$$250$$ years

$$100$$ years

$$198$$ years

$$150$$ years

Solution

Question 2

Generally not felt but recorded

Often felt & rarely causes damage

Major earth quake causes serious damage

Causes major damage to poorly constructed buildigs

Solution

Question 3

Lightning

Electric current

Both A and B

None of these

Solution

Question 4

(i)

(ii)

(iii)

(iv)

Solution

Question 5

Positive

Negative

Both positive and negative

none of the above

Solution

Question 6

Equal and opposite

Equal and similar

Unequal and similar

Unequal and opposite

Solution

Question 7

positive charge

negative charge

no charge

none of the above

Solution

Question 8

Fault zone

Eruption zone

Explosive zone

Sliding zone

Solution

Question 9

at the top

at a window

at the base

in the ground

Solution

Question 10

They get equal charged but the same nature

They get equal charged but the opposite nature

Nothing happend with rubbing

None

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.