Science - Some Natural Phenomena
Exam Duration: 45 Mins Total Questions : 30
What is the force present between two charged bodies called?
- (a)
Electrostatic force
- (b)
Electromagnetic force
- (c)
Gravitational force
- (d)
Frictional force
Suppose you are in a car and there is a thunderstorm. Which of the following is the best way to protect yourself from possible harm?
- (a)
Remaining in the car
- (b)
Getting out of the car and taking cover under the car
- (c)
Running to a nearby tree
- (d)
Getting out and standing under an electric pole
What is the 5.1.unit of electric charge
- (a)
Coulomb
- (b)
Ampere
- (c)
Volt
- (d)
Watt
What happens when an ebonite rod rubbed with fur and a glass rod rubbed with silk are brought near each other?
- (a)
They attract each other
- (b)
They repel each other.
- (c)
Nothing happens to them.
- (d)
They acquire he
What are lightning rods made up of?
- (a)
Copper
- (b)
Plastic
- (c)
Bakelite
- (d)
Sand paper
What is the purpose of an electroscope?
- (a)
To detect and test small electric charges
- (b)
To calculate the amount of electric charge flowing through the conductor
- (c)
To find out the presence of antimatter
- (d)
To test the presence of magnetic field
Why is a lightning conductor installed on a building?
- (a)
So that it collects the electric power present in the lightning
- (b)
So that it repels the lightning that falls on the building
- (c)
So that it forces the lightning to fall in an area where there are no buildings
- (d)
So that it conducts electric charge to the ground when lightning strikes the building
What happens when a glass rod is rubbed with silk cloth?
- (a)
Electrons are added to it
- (b)
Electrons are removed from
- (c)
Protons are added to it.
- (d)
Protons are removed from it
When you touch a charged body, the charge flows through you into the earth. What is this called?
- (a)
Induction
- (b)
Conduction
- (c)
Capacitance
- (d)
Earthing
What is the nature of electrical charges generated by rubbing two objects?
- (a)
Static
- (b)
Mobile
- (c)
Positive
- (d)
Negative
Which fundamental particle in an atom has no charge
- (a)
Electron
- (b)
Proton
- (c)
Neutron
- (d)
Both (A) and (B)
When we remove polyester or woollen clothes in dark, we can see a spark and hear a crackling sound. Which of the following is responsible for it?
- (a)
Static electricity
- (b)
Current electricity
- (c)
Positive charge
- (d)
Negative charge
Which of the following allows the transfer of electric charge from one charged object to another
- (a)
Vacuum
- (b)
Air
- (c)
Insulator
- (d)
Conductor
What is the lightning streaks that we see?
- (a)
UV rays from the sun
- (b)
Cosmic rays
- (c)
Accumulated electric charges
- (d)
IR rays from the sun
Which of the following countries in the world is most prone to earthquakes?
- (a)
India
- (b)
America
- (c)
China
- (d)
Japan
What are high speed winds accompanied with?
- (a)
Increased pressure
- (b)
reduced pressure
- (c)
Water vapour
- (d)
Static electricity
By which of the following methods can a body be charged?
- (a)
Conduction
- (b)
Induction
- (c)
Friction
- (d)
All of the above
Which natural calamity cannot be predicted accurately in advance?
- (a)
Flood
- (b)
Cyclone
- (c)
Earthquake
- (d)
Famine
What are the weak zones that are present around the boundaries of plates underneath the earth and cause slides and earthquakes commonly known as?
- (a)
Fault zone
- (b)
Eruption zones
- (c)
Explosive zones
- (d)
Sliding zones
On which of the following scales is the magnitude of an earthquake measured?
- (a)
Celsius
- (b)
Richter
- (c)
Fahrenheit
- (d)
Both (A) and (B
In which of the following states is an earthquake most likely to occur?
- (a)
Gujarat
- (b)
Chhatisgarh
- (c)
Chennai
- (d)
Kerala
Which of the following is caused by electric spark?
- (a)
Thunder
- (b)
Lightning
- (c)
Storm
- (d)
Cyclone
According to the law of electrostatics
- (a)
a charged body attracts similar charged bodies but repels uncharged bodies.
- (b)
a charged body attracts bodies carrying similar charge and repels bodies possessing opposite charge.
- (c)
a charged body repels bodies possessing similar charge and attracts bodies with opposite charge
- (d)
a charged body attracts all types of charged bodies
Which of the following is/are affected during lightning?
- (a)
T.V.
- (b)
Radio
- (c)
Telephone
- (d)
All of the above
What happens when water vapour changes to liquid in the form of rain drops?
- (a)
Heat is absorbed
- (b)
Heat is released.
- (c)
Heat is first absorbed and then released
- (d)
There is no release of heat
Which of the following statements is NOT true?
- (a)
Lightning and sparks from woollen clothing are essentially the same phenomena.
- (b)
When you rub a plastic scale on dry hair, it acquires charge.
- (c)
A glass rod when rubbed with silk acquires negative charge
- (d)
Static charges are called so, because they do not move by themselves.
Which of the following makes the outermost layer of the earth fragmented?
- (a)
Crust
- (b)
Plate
- (c)
Core
- (d)
Inner zone
Earthquakes at two places M and N were measured as 2 and 4. How is the magnitude and their destructive energy at M and N related?
- (a)
Tremor at N is strong as that at place 'M'.
- (b)
Tremor at N is four times stronger than that at place 'M'.
- (c)
Tremor at N is 100 times stronger than that at place 'M'.
- (d)
Tremor at N is 1000 times stronger than that at place 'M'.
Where is the crust of the earth the thickest?
- (a)
At the continents
- (b)
At the ocean
- (c)
At the poles
- (d)
Near faults
On what factors does the response of the rock to stress depend?
(i) Its temperature
(ii) The speed of stress applied
(iii)The confining pressure on the rock
- (a)
Only (i) and (ii)
- (b)
Only (ii) and (iii)
- (c)
Only (i) and (iii)
- (d)
(i), (ii) and (iii)
