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With reference to the occurrence of Tides on Earth's surface, consider the following statements:
- The difference between the force of gravitational attraction of the sun and moon and the centrifugal force leads to the generation of tides.
- The intensity of tides is magnified by the shape of bays and estuaries along a coastline.
- The tidal ranges are more than average at aphelion.
Which of the statements given above is/are correct?
- a)1, 2 and 3
- b)1 and 2 only
- c)2 only
- d)1 only
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
With reference to the occurrence of Tides on Earths surface, consider ...
- The periodical rise and fall of the sea level, once or twice a day, mainly due to the attraction of the sun and the moon, is called a tide. The moon’s gravitational pull to a great extent and to a lesser extent the sun’s gravitational pull, are the major causes for the occurrence of tides. Another factor is a centrifugal force which acts opposite to the gravitational pull of the earth. Together, the gravitational pull and the centrifugal force are responsible for creating the two major tidal bulges on the earth. On the side of the earth facing the moon, a tidal bulge occurs while on the opposite side through the gravitational attraction of the moon is less as it is farther away, the centrifugal force causes a tidal bulge on the other side. The ‘tide generating force is the difference between these two forces; i.e. the gravitational attraction of the moon and the centrifugal force. Hence statement 1 is correct.
- The shape of bays and estuaries along a coastline can magnify the intensity of tides. Funnel-shaped bays greatly change tidal magnitudes. When the tide is channeled between islands or into bays and estuaries they are called tidal currents (tidal bore is one such tidal current). Hence statement 2 is correct.
- Tidal range is the height difference between high tide and low tide.
- When the earth is closest to the sun (perihelion), around 3rd January each year, tidal ranges are also much greater, with unusually high and unusually low tides. When the earth is farthest from the sun (aphelion), around 4th July each year, tidal ranges are much less than average. Hence statement 3 is not correct
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With reference to the occurrence of Tides on Earths surface, consider ...
The correct answer is option 'B' - 1 and 2 only.
Explanation:
1. The difference between the force of gravitational attraction of the sun and moon and the centrifugal force leads to the generation of tides.
Tides are primarily caused by the gravitational attraction between the Earth, Moon, and Sun. The Moon's gravitational force is stronger on the side of the Earth facing the Moon and weaker on the opposite side. This difference in gravitational pull creates a tidal force, which causes the water on the Earth's surface to bulge towards the Moon. Additionally, the centrifugal force resulting from the Earth and Moon's rotation around a common center of mass also contributes to the generation of tides.
2. The intensity of tides is magnified by the shape of bays and estuaries along a coastline.
The shape of bays and estuaries can have a significant impact on the intensity of tides. When the tidal wave enters a narrow bay or estuary, it encounters resistance from the narrowing channel, causing the amplitude (height) of the tide to increase. This phenomenon is known as tidal amplification. In contrast, in open ocean areas, the tidal wave can spread out over a larger area, leading to lower tidal amplitudes.
3. The tidal ranges are more than average at aphelion.
Aphelion refers to the point in the Earth's orbit where it is farthest from the Sun. However, the intensity of tides is not directly related to the Earth's distance from the Sun. Tidal ranges primarily depend on the positions and alignments of the Moon, Sun, and Earth. Therefore, statement 3 is incorrect.
To summarize, statement 1 is correct because the difference between gravitational attraction and centrifugal force generates tides. Statement 2 is correct because the shape of bays and estuaries can magnify the intensity of tides. Statement 3 is incorrect because tidal ranges are not more than average at aphelion.
Explanation:
1. The difference between the force of gravitational attraction of the sun and moon and the centrifugal force leads to the generation of tides.
Tides are primarily caused by the gravitational attraction between the Earth, Moon, and Sun. The Moon's gravitational force is stronger on the side of the Earth facing the Moon and weaker on the opposite side. This difference in gravitational pull creates a tidal force, which causes the water on the Earth's surface to bulge towards the Moon. Additionally, the centrifugal force resulting from the Earth and Moon's rotation around a common center of mass also contributes to the generation of tides.
2. The intensity of tides is magnified by the shape of bays and estuaries along a coastline.
The shape of bays and estuaries can have a significant impact on the intensity of tides. When the tidal wave enters a narrow bay or estuary, it encounters resistance from the narrowing channel, causing the amplitude (height) of the tide to increase. This phenomenon is known as tidal amplification. In contrast, in open ocean areas, the tidal wave can spread out over a larger area, leading to lower tidal amplitudes.
3. The tidal ranges are more than average at aphelion.
Aphelion refers to the point in the Earth's orbit where it is farthest from the Sun. However, the intensity of tides is not directly related to the Earth's distance from the Sun. Tidal ranges primarily depend on the positions and alignments of the Moon, Sun, and Earth. Therefore, statement 3 is incorrect.
To summarize, statement 1 is correct because the difference between gravitational attraction and centrifugal force generates tides. Statement 2 is correct because the shape of bays and estuaries can magnify the intensity of tides. Statement 3 is incorrect because tidal ranges are not more than average at aphelion.
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With reference to the occurrence of Tides on Earths surface, consider the following statements: The difference between the force of gravitational attraction of the sun and moon and the centrifugal force leads to the generation of tides. The intensity of tides is magnified by the shape of bays and estuaries along a coastline. The tidal ranges are more than average at aphelion.Which of the statements given above is/are correct?a)1, 2 and 3b)1 and 2 onlyc)2 onlyd)1 onlyCorrect answer is option 'B'. Can you explain this answer?
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With reference to the occurrence of Tides on Earths surface, consider the following statements: The difference between the force of gravitational attraction of the sun and moon and the centrifugal force leads to the generation of tides. The intensity of tides is magnified by the shape of bays and estuaries along a coastline. The tidal ranges are more than average at aphelion.Which of the statements given above is/are correct?a)1, 2 and 3b)1 and 2 onlyc)2 onlyd)1 onlyCorrect answer is option 'B'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about With reference to the occurrence of Tides on Earths surface, consider the following statements: The difference between the force of gravitational attraction of the sun and moon and the centrifugal force leads to the generation of tides. The intensity of tides is magnified by the shape of bays and estuaries along a coastline. The tidal ranges are more than average at aphelion.Which of the statements given above is/are correct?a)1, 2 and 3b)1 and 2 onlyc)2 onlyd)1 onlyCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for With reference to the occurrence of Tides on Earths surface, consider the following statements: The difference between the force of gravitational attraction of the sun and moon and the centrifugal force leads to the generation of tides. The intensity of tides is magnified by the shape of bays and estuaries along a coastline. The tidal ranges are more than average at aphelion.Which of the statements given above is/are correct?a)1, 2 and 3b)1 and 2 onlyc)2 onlyd)1 onlyCorrect answer is option 'B'. Can you explain this answer?.
With reference to the occurrence of Tides on Earths surface, consider the following statements: The difference between the force of gravitational attraction of the sun and moon and the centrifugal force leads to the generation of tides. The intensity of tides is magnified by the shape of bays and estuaries along a coastline. The tidal ranges are more than average at aphelion.Which of the statements given above is/are correct?a)1, 2 and 3b)1 and 2 onlyc)2 onlyd)1 onlyCorrect answer is option 'B'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about With reference to the occurrence of Tides on Earths surface, consider the following statements: The difference between the force of gravitational attraction of the sun and moon and the centrifugal force leads to the generation of tides. The intensity of tides is magnified by the shape of bays and estuaries along a coastline. The tidal ranges are more than average at aphelion.Which of the statements given above is/are correct?a)1, 2 and 3b)1 and 2 onlyc)2 onlyd)1 onlyCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for With reference to the occurrence of Tides on Earths surface, consider the following statements: The difference between the force of gravitational attraction of the sun and moon and the centrifugal force leads to the generation of tides. The intensity of tides is magnified by the shape of bays and estuaries along a coastline. The tidal ranges are more than average at aphelion.Which of the statements given above is/are correct?a)1, 2 and 3b)1 and 2 onlyc)2 onlyd)1 onlyCorrect answer is option 'B'. Can you explain this answer?.
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