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 70]
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Question 1 of 10
1. Question
Consider the following statements:
- When the light is reflected from a surface, the angle of incidence is generally equal to the angle of reflection.
- laws of reflection are applicable to all types of reflecting surfaces except spherical surfaces.
Which of the statements given above is/are NOT CORRECT?
Correct
Solution (b)
When the light is reflected from a surface, the angle of incidence is generally equal to the angle of reflection.
Hence Statement 1 is correct.
laws of reflection are applicable to all types of reflecting surfaces including spherical surfaces.
Hence Statement 2 is incorrect.
Incorrect
Solution (b)
When the light is reflected from a surface, the angle of incidence is generally equal to the angle of reflection.
Hence Statement 1 is correct.
laws of reflection are applicable to all types of reflecting surfaces including spherical surfaces.
Hence Statement 2 is incorrect.
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Question 2 of 10
2. Question
Consider the following statements regarding formation of image by a plane mirror:
- Image formed by a plane mirror is always virtual and erect.
- The image formed is as far behind the mirror as the object is in front of it.
Which of the statements given above is/are correct?
Correct
Solution (c)
Image formed by a plane mirror is always virtual and erect. The size of the image is equal to that of the object.
Hence Statement 1 is correct.
The image formed is as far behind the mirror as the object is in front of it. Further, the image is laterally inverted.
Hence Statement 2 is correct.
Incorrect
Solution (c)
Image formed by a plane mirror is always virtual and erect. The size of the image is equal to that of the object.
Hence Statement 1 is correct.
The image formed is as far behind the mirror as the object is in front of it. Further, the image is laterally inverted.
Hence Statement 2 is correct.
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Question 3 of 10
3. Question
Consider the following statements:
- Conventionally, in an electric circuit the direction of electric current is taken as the same direction of the flow of electrons.
- Electric current is expressed by the amount of charge flowing through a particular area in unit time.
Which of the statements given above is/are correct?
Correct
Solution (b)
Conventionally, in an electric circuit the direction of electric current is taken as opposite to the direction of the flow of electrons, which are negative charges.
Hence Statement 1 is incorrect.
Electric current is expressed by the amount of charge flowing through a particular area in unit time.
Hence Statement 2 is correct.
Incorrect
Solution (b)
Conventionally, in an electric circuit the direction of electric current is taken as opposite to the direction of the flow of electrons, which are negative charges.
Hence Statement 1 is incorrect.
Electric current is expressed by the amount of charge flowing through a particular area in unit time.
Hence Statement 2 is correct.
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Question 4 of 10
4. Question
Consider the following statements:
- The electrons are able to travel through a perfect solid crystal smoothly.
- The motion of electrons in a conductor is very different from that of charges in empty space.
Which of the statements given above is/are correct?
Correct
Solution (c)
Electrons are able to ‘travel’ through a perfect solid crystal smoothly and easily, almost as if they were in a vacuum.
Hence Statement 1 is correct.
The motion of electrons in a conductor, however, is very different from that of charges in empty space.
Hence Statement 2 is correct.
Incorrect
Solution (c)
Electrons are able to ‘travel’ through a perfect solid crystal smoothly and easily, almost as if they were in a vacuum.
Hence Statement 1 is correct.
The motion of electrons in a conductor, however, is very different from that of charges in empty space.
Hence Statement 2 is correct.
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Question 5 of 10
5. Question
Consider the following statements:
- Magnetic field is a quantity that has direction but not magnitude.
- The relative strength of the magnetic field is shown by the degree of closeness of the field lines.
Which of the statements given above is/are correct?
Correct
Solution (b)
Magnetic field is a quantity that has both direction and magnitude.
Hence Statement 1 is incorrect.
The relative strength of the magnetic field is shown by the degree of closeness of the field lines.
No two field lines are found to cross each other.
Hence Statement 2 is correct.
Incorrect
Solution (b)
Magnetic field is a quantity that has both direction and magnitude.
Hence Statement 1 is incorrect.
The relative strength of the magnetic field is shown by the degree of closeness of the field lines.
No two field lines are found to cross each other.
Hence Statement 2 is correct.
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Question 6 of 10
6. Question
Which of the following statements about Dr. Har Gobind Khorana is/are correct?
- He was the first Indian-born Nobel Prize winner in Medicine
- The award was given for discovering that the order of nucleotides in DNA determines which amino acids are built.
- He is credited with making the first synthetic genes by cutting and pasting different bits of DNA together.
Select the correct answer using the code given below:
Correct
Solution (b)
Har Gobind Khorana was an Indian American biochemist who shared the 1968 Nobel Prize for Physiology or Medicine with Marshall W. Nirenberg and Robert W. Holley
Hence statement 1 incorrect
The award was given for discovering that the order of nucleotides in DNA determines which amino acids are built.
Hence statement 2 correct
He is credited with making the first synthetic genes by cutting and pasting different bits of DNA together.
Hence statement 3 correct
Incorrect
Solution (b)
Har Gobind Khorana was an Indian American biochemist who shared the 1968 Nobel Prize for Physiology or Medicine with Marshall W. Nirenberg and Robert W. Holley
Hence statement 1 incorrect
The award was given for discovering that the order of nucleotides in DNA determines which amino acids are built.
Hence statement 2 correct
He is credited with making the first synthetic genes by cutting and pasting different bits of DNA together.
Hence statement 3 correct
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Question 7 of 10
7. Question
Millimeter waves are broadcast at frequencies between:
Correct
Solution (c)
Millimeter wave (also millimeter band) is the band of spectrum between 30 gigahertz (Ghz) and 300 Ghz. Researchers are testing 5G wireless broadband technology on millimeter wave spectrum.
Incorrect
Solution (c)
Millimeter wave (also millimeter band) is the band of spectrum between 30 gigahertz (Ghz) and 300 Ghz. Researchers are testing 5G wireless broadband technology on millimeter wave spectrum.
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Question 8 of 10
8. Question
C.V. Raman, was the first Indian Scientist to receive a Nobel Price. He published his theory on the Raman Effect in 1928. Raman Effect is associated with which of the following?
Correct
Solution (a)
Raman Effect, change in the wavelength of light that occurs when a light beam is deflected by molecules.
When a beam of light traverses a dust-free, transparent sample of a chemical compound, a small fraction of the light emerges in directions other than that of the incident (incoming) beam. Most of this scattered light is of unchanged wavelength. A small part, however, has wavelengths different from that of the incident light; its presence is a result of the Raman Effect.
Incorrect
Solution (a)
Raman Effect, change in the wavelength of light that occurs when a light beam is deflected by molecules.
When a beam of light traverses a dust-free, transparent sample of a chemical compound, a small fraction of the light emerges in directions other than that of the incident (incoming) beam. Most of this scattered light is of unchanged wavelength. A small part, however, has wavelengths different from that of the incident light; its presence is a result of the Raman Effect.
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Question 9 of 10
9. Question
Consider the following statements regarding microwave ovens:
- Instead of generating heat that warms the food from outside, the microwaves penetrate food and create the heat within.
- Microwaves are electromagnetic waves that are created by a component called ‘Megatron’ in the oven.
- Microwaves are known to destroy the nutrients in the food.
Which of the above statements is/are correct?
Correct
Solution (a)
The key component of a microwave oven is the magnetron. Although the name conjures up hardware from a questionable science-fiction movie, the sophisticated vacuum tube generates microwaves powerful enough for military radars (for which it was originally developed). Instead of a flame or electric coil generating heat that warms food from the outside, the microwaves penetrate food and create heat from within.
Microwaves generally do not destroy the nutrients in the food.
Incorrect
Solution (a)
The key component of a microwave oven is the magnetron. Although the name conjures up hardware from a questionable science-fiction movie, the sophisticated vacuum tube generates microwaves powerful enough for military radars (for which it was originally developed). Instead of a flame or electric coil generating heat that warms food from the outside, the microwaves penetrate food and create heat from within.
Microwaves generally do not destroy the nutrients in the food.
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Question 10 of 10
10. Question
Consider the following statements with respect to Dispersion of light:
- The sequence VIBGYOR is in the order of increasing frequency.
- The red light used in the traffic light is visible even in dense fog, because it has lowest frequency in the VIBGYOR colour spectrum.
Which of the above statements is/are correct?
Correct
Solution (b)
The sequence VIBGYOR is in the order of decreasing frequency or increasing wave length.
Hence statement 1 is incorrect
The light which has lowest frequency (Red) will bend slightly whereas light which has more frequency will bend more (Violet)
Hence statement 2 is correct
Incorrect
Solution (b)
The sequence VIBGYOR is in the order of decreasing frequency or increasing wave length.
Hence statement 1 is incorrect
The light which has lowest frequency (Red) will bend slightly whereas light which has more frequency will bend more (Violet)
Hence statement 2 is correct
