IASbaba's Daily Static Quiz
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DAILY STATIC QUIZ will cover all the topics of Static/Core subjects – Polity, History, Geography, Economics, Environment and Science and technology.
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UPSC Static Quiz - 2020: IASbaba's Daily Static Quiz - SCIENCE & TECHNOLOGY [Day 77]
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Question 1 of 10
1. Question
Consider the following statements:
- The loudness of sound depends on its amplitude and the frequency determines the pitch of a sound.
- Sounds of frequencies less than about 20,000 vibrations per second cannot be detected by the human ear
Which of the statements given above is/are correct?
Correct
Solution (a)
The loudness of sound depends on its amplitude and the frequency determines the pitch of a sound.
Hence statement 1 correct
The range of audible frequencies for a human ear is roughly from 20 to 20,000 vibrations per second (20 to 20,000 Hz).
Hence statement 2 incorrect
Incorrect
Solution (a)
The loudness of sound depends on its amplitude and the frequency determines the pitch of a sound.
Hence statement 1 correct
The range of audible frequencies for a human ear is roughly from 20 to 20,000 vibrations per second (20 to 20,000 Hz).
Hence statement 2 incorrect
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Question 2 of 10
2. Question
Consider the following:
- Total Internal Reflection
- Refraction
- Dispersion
Which of the above mentioned phenomena plays a role in the formation of Rainbow?
Correct
Solution (d)
A rainbow is a meteorological phenomenon that is caused by Total Internal Reflection, Refraction and Dispersion of light in water droplets resulting in a spectrum of light appearing in the sky.
Incorrect
Solution (d)
A rainbow is a meteorological phenomenon that is caused by Total Internal Reflection, Refraction and Dispersion of light in water droplets resulting in a spectrum of light appearing in the sky.
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Question 3 of 10
3. Question
Which of the following statements is/are correct regarding diffused reflection?
- When all the parallel rays reflected from a plane surface are not parallel, the reflection is known as diffused reflection.
- The diffused reflection is due to the failure of the laws of reflection.
- The diffused reflection is caused by the irregularities in the reflecting surface.
Which of the statements given above is/are correct?
Correct
Solution (c)
When all the parallel rays reflected from a plane surface are not parallel, the reflection is known as diffused or irregular reflection.
Hence statement 1 is correct
The diffused reflection is not due to the failure of the laws of reflection. It is caused by the irregularities in the reflecting sur face
Hence statement 2 incorrect
The diffused reflection is caused by the irregularities in the reflecting surface, like that of a cardboard.
Hence statement 3 is correct
Incorrect
Solution (c)
When all the parallel rays reflected from a plane surface are not parallel, the reflection is known as diffused or irregular reflection.
Hence statement 1 is correct
The diffused reflection is not due to the failure of the laws of reflection. It is caused by the irregularities in the reflecting sur face
Hence statement 2 incorrect
The diffused reflection is caused by the irregularities in the reflecting surface, like that of a cardboard.
Hence statement 3 is correct
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Question 4 of 10
4. Question
Consider the following statements:
- The image formed by a concave mirror will be always larger in size than the object.
- Convex mirrors can form images of objects spread over a large area.
- The image formed by convex mirror may be real or virtual.
Which of the statements given above is/are correct?
Correct
Solution (c)
The image formed by a concave mirror can be smaller or larger in size than the object.
Concave mirrors are commonly used in torches, search-lights and vehicles headlights to get powerful parallel beams of light.
Hence statement 1 is incorrect
Convex mirrors can form images of objects spread over a large area. So, these help the drivers to see the traffic behind them.
Hence statement 2 is correct
The image formed by a concave mirror may be real or virtual.
Hence statement 3 is incorrect
Incorrect
Solution (c)
The image formed by a concave mirror can be smaller or larger in size than the object.
Concave mirrors are commonly used in torches, search-lights and vehicles headlights to get powerful parallel beams of light.
Hence statement 1 is incorrect
Convex mirrors can form images of objects spread over a large area. So, these help the drivers to see the traffic behind them.
Hence statement 2 is correct
The image formed by a concave mirror may be real or virtual.
Hence statement 3 is incorrect
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Question 5 of 10
5. Question
Which of the following statements is/are correct regarding Nobel Prize?
- The Nobel Prize in Physics is awarded by The Royal Swedish Academy of Sciences, Stockholm, Sweden.
- One can nominate himself or herself to be eligible for the Physics Prize.
- The statutes of the Nobel Foundation restrict disclosure of information about the nominations, whether publicly or privately, for 50 years.
Select the correct answer using the code given below:
Correct
Solution (b)
The Nobel Prize in Physics is awarded by The Royal Swedish Academy of Sciences, Stockholm, Sweden.
Hence statement 1 is correct
The candidates eligible for the Physics Prize are those nominated by qualified persons who have received an invitation from the Nobel Committee to submit names for consideration. No one can nominate himself or herself.
Hence statement 2 is incorrect
The statutes of the Nobel Foundation restrict disclosure of information about the nominations, whether publicly or privately, for 50 years.
Hence statement 3 is correct
Incorrect
Solution (b)
The Nobel Prize in Physics is awarded by The Royal Swedish Academy of Sciences, Stockholm, Sweden.
Hence statement 1 is correct
The candidates eligible for the Physics Prize are those nominated by qualified persons who have received an invitation from the Nobel Committee to submit names for consideration. No one can nominate himself or herself.
Hence statement 2 is incorrect
The statutes of the Nobel Foundation restrict disclosure of information about the nominations, whether publicly or privately, for 50 years.
Hence statement 3 is correct
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Question 6 of 10
6. Question
Which of the following are illustrations of total internal reflection?
- Shining of air bubble in water
- Sparkling of diamond
- Increase in duration of sun’s visibility
- Mirage and looming
- Ophthalmoscope
Choose the appropriate code:
Correct
Solution (d)
Total Internal Reflection:
If light is propagating from denser medium towards the rarer medium and angle of incidence is more than critical angle, then the light incident on the boundary is reflected back in the denser medium, obeying the laws of reflection. This phenomenon is called total internal reflection as total light energy is reflected, no part is absorbed or transmitted.
For total internal reflection,
1) Light must be propagating from denser to rarer medium
2) Angle of incidence must exceed the critical angle
Incorrect
Solution (d)
Total Internal Reflection:
If light is propagating from denser medium towards the rarer medium and angle of incidence is more than critical angle, then the light incident on the boundary is reflected back in the denser medium, obeying the laws of reflection. This phenomenon is called total internal reflection as total light energy is reflected, no part is absorbed or transmitted.
For total internal reflection,
1) Light must be propagating from denser to rarer medium
2) Angle of incidence must exceed the critical angle
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Question 7 of 10
7. Question
A fuel cell is a device that generates electricity by a chemical reaction. Consider the following
- Molten carbonate fuel cells
- Phosphoric Acid fuel cells
- Hydrogen fuel cells
- Solid oxide fuel cells
Which of the above is/are types of fuel cells?
Correct
Solution (d)
Similar to batteries and all other electrochemical cells, fuel cells have two electrodes, and an electrolyte sandwiched in between. Fuel cells are distinguished by the type of electrolyte they use. The more common fuel cells on the market are:
PEM “Polymer Exchange Membrane” also known as “Polymer Electrolyte Membrane” Fuel Cell (PEMFC)
“Solid Oxide” Fuel cell (SOFC),
“Molten Carbonate” Fuel cell (MCFC),
Incorrect
Solution (d)
Similar to batteries and all other electrochemical cells, fuel cells have two electrodes, and an electrolyte sandwiched in between. Fuel cells are distinguished by the type of electrolyte they use. The more common fuel cells on the market are:
PEM “Polymer Exchange Membrane” also known as “Polymer Electrolyte Membrane” Fuel Cell (PEMFC)
“Solid Oxide” Fuel cell (SOFC),
“Molten Carbonate” Fuel cell (MCFC),
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Question 8 of 10
8. Question
Which of the following forces are not the example of contact forces?
- Friction force
- Electrostatic force
- Magnetic force
- Gravitational force
- Air resistance force
Select the code from the following:
Correct
Solution (c)
Friction force is an example of a contact force. Rest of the three forces acts from a distance and don’t require body to body contact.
Contact Forces
Action-at-a-Distance Forces
Frictional Force
Gravitational Force
Tension Force
Electrical Force
Normal Force
Magnetic Force
Air Resistance Force
Applied Force
Spring Force
Incorrect
Solution (c)
Friction force is an example of a contact force. Rest of the three forces acts from a distance and don’t require body to body contact.
Contact Forces
Action-at-a-Distance Forces
Frictional Force
Gravitational Force
Tension Force
Electrical Force
Normal Force
Magnetic Force
Air Resistance Force
Applied Force
Spring Force
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Question 9 of 10
9. Question
Consider the following situation:
If an object is released from a moving train, the object will go:
Correct
Solution (b)
The object will be in inertia of motion. As it was moving with train, it had a component of velocity in the direction of motion. If it is released, that component will still be there and it will fall in the direction of motion of the train.
Incorrect
Solution (b)
The object will be in inertia of motion. As it was moving with train, it had a component of velocity in the direction of motion. If it is released, that component will still be there and it will fall in the direction of motion of the train.
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Question 10 of 10
10. Question
Steam burns are more severe than the burns caused by boiling water because:
Correct
Solution (b)
Steam burns are more severe as steam contains more heat in the form of latent heat.
Incorrect
Solution (b)
Steam burns are more severe as steam contains more heat in the form of latent heat.
