Science and Technology I · Textbook solutions
Space Missions
Every solved example, exercise, and miscellaneous question, in the order the textbook teaches them. Plus every board question asked from this chapter. · 15 questions
Exercise
15 q
- Fill in the blanks and explain the statements with reasoning:Ex Q1(a)If the height of the orbit of a satellite from the earth surface is increased, the tangential velocity of the satellite will …
- Ex Q1(b)The initial velocity (during launching) of the Managalyaan, must be greater than …………..of the earth.
- State with reasons whether the following sentences are true or falseEx Q2(a)If a spacecraft has to be sent away from the influence of earth's gravitational field, its velocity must be less than the escape velocity.
- Ex Q2(b)The escape velocity on the moon is less than that on the earth.
- Ex Q2(d)A satellite needs a specific velocity to revolve in a specific orbit.
- Ex Q2(e)If the height of the orbit of a satellite increases, its velocity must also increase.
- Answer the following questions:Ex Q3(a)What is meant by an artificial satellite? How are the satellites classified based on their functions?
- Ex Q3(b)What is meant by the orbit of a satellite? On what basis and how are the orbits of artificial satellites classified?
- Ex Q3(c)Why are geostationary satellites not useful for studies of polar regions?
- Ex Q3(d)What is meant by satellite launch vehicles? Explain a satellite launch vehicle developed by ISRO with the help of a schematic diagram.
- Ex Q3(e)Why it is beneficial to use satellite launch vehicles made of more than one stage?
- Ex Q4Complete the following table.
IRNSS Weather study & predict Earth's observation - Solve the following problems.Ex Q5(a)If mass of a planet is eight times the mass of the earth and its radius is twice the radius of the earth, what will be the escape velocity for that planet?
- Ex Q5(b)How much time a satellite in an orbit at height 35780 km above earth's surface would take, if the mass of the earth would have been four times its original mass?
- Ex Q5(c)If the height of a satellite completing one revolution around the earth in T seconds is meter, then what would be the height of a satellite taking seconds for one revolution?
What the board has asked from this chapter
Questions per paper · 10 papers · 2019 to 2026
2019: 2 questions per paper. 2020: 3 questions per paper. 2022: 3 questions per paper. 2023: 3 questions per paper. 2024: 1.5 questions per paper. 2025: 2 questions per paper. 2026: 1.5 questions per paper
June 2026
2 q
- Q2(A)(iii)शास्त्रीय कारणे लिहा : ध्रुवीय प्रदेशाच्या अभ्यासासाठी भूस्थिर उपग्रह उपयोगी पडत नाहीत.Give scientific reason: Geostationary satellites are not useful for studies of polar regions.Satellites and Orbits
- Q3(vi)खालील परिच्छेद वाचून प्रश्नांची उत्तरे लिहा : अवकाशातील कचरा व त्याचे व्यवस्थापन कृत्रिम उपग्रहांबरोबरच इतरही मानवनिर्मित वस्तू पृथ्वीभोवती परिभ्रमण करीत आहेत. यात आता कार्यशील नसलेले उपग्रह, प्रक्षेपणाच्या वेळी सुटे झालेले प्रक्षेपकांचे भाग व एखादा उपग्रह दुसऱ्या एखाद्या उपग्रहावर किंवा अवकाशातील इतर वस्तूवर आदळल्यामुळे निर्माण होणारे तुकडे अशा सर्व वस्तूंचा यात समावेश होतो. 2016 च्या एका अंदाजाप्रमाणे अशा निरूपयोगी वस्तूंचे 1 सेमी हून जास्त लांबीचे 2 कोटी तुकडे पृथ्वीभोवती परिभ्रमण करीत आहेत. हे सगळे म्हणजे अवकाशातील कचराच होय. हा कचरा कृत्रिम उपग्रहांसाठी धोक्याचा ठरू शकतो. उपग्रहांवर व इतर अवकाशयानांवर आदळून तो त्यांना हानी पोहोचवू शकतो. हा कचरा दिवसेंदिवस वाढत चाला आहे. लवकरच यामुळे नवीन अवकाशयानांचे प्रक्षेपण कठीण होऊन बसेल. त्यामुळे या कचऱ्याचे व्यवस्थापन करणे गरजेचे आहे. या दृष्टीने काही पद्धतींचे अध्ययन व काही प्रयोग करण्यात येत आहेत. (अ) अवकाश कचरा म्हणजे काय ? (ब) अवकाशातील कचरा कृत्रिम उपग्रहासाठी कसा धोकादायक ठरू शकतो ? (क) या कचऱ्याचे व्यवस्थापन करण्याच्या दृष्टीने कोणते प्रयत्न केले जात आहेत ?Read the following passage and answer the questions given below: Space Debris and its management In addition to the artificial satellite, some other objects are also revolving around the earth. It includes, non-functional satellites, parts of the launcher detached during launching and debris generated due to collision of satellite with other satellite or any other object in the space. According to one estimation mode in 2016, there are about 2 crore pieces of length more than 1 cm, revolving around the earth! All this is nothing but the debris in space. This debris can be harmful to the artificial satellites. It can collide with these satellites or spacecrafts and damage them. This debris is increasing day by day. Soon, it will be difficult to launch new spacecrafts. It is, therefore, very essential to manage the debris. Some studies and experiments are being done with this in view. (a) What is meant by space debris? (b) How it can be harmful to the artificial satellites? (c) What efforts are being taken to manage it?Space Debris and its Management
March 2026
1 q
- Q2(A)(i)शास्त्रीय कारणे लिहा : ध्रुवीय प्रदेशाच्या अभ्यासासाठी भू-स्थिर उपग्रह उपयोगी पडत नाही.Give scientific reason: The geostationary satellites are not useful for studies of polar regions.Satellites and Orbits
July 2025
2 q
- Q1(A)(v)भूपृष्ठापासून उच्च भ्रमणकक्षेची उंची ____.Height of the High earth orbit from the surface of the earth is ____ .
Tap an option to check your answer.
Satellites and Orbits - Q3(vii)खालील तक्ता पूर्ण करा : हवामान उपग्रह IRNSS पृथ्वी निरीक्षणComplete the following chart: (a chart of satellites with the given entries IRNSS, Weather Study and Predict, and Earth's Observation; the other boxes are to be filled)Satellites and Orbits
March 2025
2 q
- Q2(B)(iv)‘दिवाळीच्या फटाक्यांमध्ये रॉकेट हा एक प्रकारचा फटाका असतो’ यावरून खालील प्रश्नांची उत्तरे द्या : (a) प्रक्षेपकाचे नाव सांगा. (b) त्याचे कार्य कोणत्या नियमानुसार चालते ?The 'rocket' is a type of fire cracker used in Diwali. (a) Name the launcher. (b) Name the law on which its working is based.Launch Vehicles
- Q3(viii)खालील सारणी पूर्ण करा :
उपग्रहाचा प्रकार उपग्रहाचे कार्य भारताच्या उपग्रहमालिकांची व प्रक्षेपकांची नावे (a) ____ पृथ्वीवरील कुठल्याही ठिकाणाचे भौगोलिक स्थान निश्चित करणे. ____ (b) हवामान उपग्रह ____ ____ (c) ____ ____ IRS प्रक्षेपक : PSLV Complete the following table:Type of the satellite Function of the satellite The names of the Indian satellite series and their launch vehicles (a) ____ Fix the location of any place on the earth's surface ____ (b) Weather satellite ____ ____ (c) ____ ____ IRS; Launcher: PSLV Satellites and Orbits
July 2024
2 q
- Q2(A)(iii)शास्त्रीय कारणे लिहा : अवकाशातील कचऱ्याचे व्यवस्थापन करणे गरजेचे आहे.Give scientific reason: It is necessary to manage the space debris.Space Debris and its Management
- Q3(vii)(a) भारताने प्रक्षेपित केलेल्या व सध्या कार्यरत असणाऱ्या दूरचित्रवाणी प्रसारण, दूरसंचार आणि हवामानशास्त्र सेवा यांच्याशी संबंधित उपग्रह मालिकेची नावे लिहा. (b) सध्या फक्त शिक्षणक्षेत्रात वापरली जाणारी उपग्रह मालिका कोणती ? (c) पृथ्वीवरील कोणत्याही ठिकाणचे भौगोलिक स्थान निश्चित करण्यासाठी कोणती उपग्रह मालिका प्रस्थापित केली आहे ?Give the names of the following satellite series developed by India: (a) Satellite series actively working in the field of telecommunication, television and meteorological services. (b) Satellite series specially working in the field of education. (c) Satellite series to exactly locate position of any place on earth's surface.Space Missions of India
March 2024
1 q
- Q2(B)(iii)उपग्रह प्रक्षेपक म्हणजे काय ? कोणत्याही एका भारतीय उपग्रह प्रक्षेपकाचे नाव लिहा.What is meant by satellite launch vehicle? Name any one Indian satellite launch vehicle.Launch Vehicles
March 2023
3 q
- Q1(A)(v)The height of medium earth orbit above the surface of the earth is:
Tap an option to check your answer.
Satellites and Orbits - Q1(B)(v)Write the name of the small satellite made by a group of students from COEP (College of Engineering, Pune) sent to space through ISRO in 2016.Space Missions of India
- Q2(B)(iv)Complete the following table (write the names of Indian satellites and their launchers):
Type of Satellite Satellite Launcher (1) Navigational Satellite ______ ______ (2) Earth observation Satellite ______ ______ Space Missions of India
March 2022
3 q
- Q1(A)(ii)The functioning of the satellite launch vehicle is based on ________.
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Rocket Propulsion - Q1(B)(i)Find the odd one out: INSAT, GSAT, IRS, PSLV.Satellites and Launch Vehicles
- Q3(viii)State the importance of Space Mission.Importance of Space Missions
March 2020
3 q
- Q1(A)(iv)The astronomical object closest to us is _______.
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Astronomical Objects - Q1(B)(v)Name the first artificial satellite sent by Russia in space.Artificial Satellites
- Q3(v)What is an artificial satellite? Name any two types of artificial satellite and state their functions.Artificial Satellites and Their Types
March 2019
2 q
- Q1(A)(4)By considering the first correlation, complete the second correlation: Hubble telescope : 569 km high from earth surface :: Revolving orbit of Hubble telescope : ____Satellites and Orbits
- Q3(7)What is meant by space debris? Why is there a need to manage the debris?Space Debris and its Management
The 10 board questions to practise first
The questions the board asked again come first, most asked first. Each one says how often and when.
Question 1
Asked 3 times: Mar 2019, Jul 2024*, Jun 2026* (* = numbers or wording changed that year)
Q3(vi)खालील परिच्छेद वाचून प्रश्नांची उत्तरे लिहा : अवकाशातील कचरा व त्याचे व्यवस्थापन कृत्रिम उपग्रहांबरोबरच इतरही मानवनिर्मित वस्तू पृथ्वीभोवती परिभ्रमण करीत आहेत. यात आता कार्यशील नसलेले उपग्रह, प्रक्षेपणाच्या वेळी सुटे झालेले प्रक्षेपकांचे भाग व एखादा उपग्रह दुसऱ्या एखाद्या उपग्रहावर किंवा अवकाशातील इतर वस्तूवर आदळल्यामुळे निर्माण होणारे तुकडे अशा सर्व वस्तूंचा यात समावेश होतो. 2016 च्या एका अंदाजाप्रमाणे अशा निरूपयोगी वस्तूंचे 1 सेमी हून जास्त लांबीचे 2 कोटी तुकडे पृथ्वीभोवती परिभ्रमण करीत आहेत. हे सगळे म्हणजे अवकाशातील कचराच होय. हा कचरा कृत्रिम उपग्रहांसाठी धोक्याचा ठरू शकतो. उपग्रहांवर व इतर अवकाशयानांवर आदळून तो त्यांना हानी पोहोचवू शकतो. हा कचरा दिवसेंदिवस वाढत चाला आहे. लवकरच यामुळे नवीन अवकाशयानांचे प्रक्षेपण कठीण होऊन बसेल. त्यामुळे या कचऱ्याचे व्यवस्थापन करणे गरजेचे आहे. या दृष्टीने काही पद्धतींचे अध्ययन व काही प्रयोग करण्यात येत आहेत. (अ) अवकाश कचरा म्हणजे काय ? (ब) अवकाशातील कचरा कृत्रिम उपग्रहासाठी कसा धोकादायक ठरू शकतो ? (क) या कचऱ्याचे व्यवस्थापन करण्याच्या दृष्टीने कोणते प्रयत्न केले जात आहेत ?Read the following passage and answer the questions given below: Space Debris and its management In addition to the artificial satellite, some other objects are also revolving around the earth. It includes, non-functional satellites, parts of the launcher detached during launching and debris generated due to collision of satellite with other satellite or any other object in the space. According to one estimation mode in 2016, there are about 2 crore pieces of length more than 1 cm, revolving around the earth! All this is nothing but the debris in space. This debris can be harmful to the artificial satellites. It can collide with these satellites or spacecrafts and damage them. This debris is increasing day by day. Soon, it will be difficult to launch new spacecrafts. It is, therefore, very essential to manage the debris. Some studies and experiments are being done with this in view. (a) What is meant by space debris? (b) How it can be harmful to the artificial satellites? (c) What efforts are being taken to manage it?Question 2
Asked 2 times: Mar 2026, Jun 2026
Q2(A)(iii)शास्त्रीय कारणे लिहा : ध्रुवीय प्रदेशाच्या अभ्यासासाठी भूस्थिर उपग्रह उपयोगी पडत नाहीत.Give scientific reason: Geostationary satellites are not useful for studies of polar regions.Question 3
This type asked 6 times: Mar 2020, Mar 2022, Mar 2023, Jul 2024, Mar 2025, Jul 2025. This one: Jul 2025
Q3(vii)खालील तक्ता पूर्ण करा : हवामान उपग्रह IRNSS पृथ्वी निरीक्षणComplete the following chart: (a chart of satellites with the given entries IRNSS, Weather Study and Predict, and Earth's Observation; the other boxes are to be filled)Question 4
This type asked 3 times: Mar 2019, Mar 2023, Jul 2025. This one: Jul 2025
Q1(A)(v)भूपृष्ठापासून उच्च भ्रमणकक्षेची उंची ____.Height of the High earth orbit from the surface of the earth is ____ .Tap an option to check your answer.
Question 5
This type asked 3 times: Mar 2022, Mar 2024, Mar 2025. This one: Mar 2025
Q2(B)(iv)‘दिवाळीच्या फटाक्यांमध्ये रॉकेट हा एक प्रकारचा फटाका असतो’ यावरून खालील प्रश्नांची उत्तरे द्या : (a) प्रक्षेपकाचे नाव सांगा. (b) त्याचे कार्य कोणत्या नियमानुसार चालते ?The 'rocket' is a type of fire cracker used in Diwali. (a) Name the launcher. (b) Name the law on which its working is based.Question 6
This type asked 2 times: Mar 2020, Mar 2023. This one: Mar 2023
Q1(B)(v)Write the name of the small satellite made by a group of students from COEP (College of Engineering, Pune) sent to space through ISRO in 2016.Question 7
Asked once: Mar 2025 (same type asked 6 times)
Q3(viii)खालील सारणी पूर्ण करा :उपग्रहाचा प्रकार उपग्रहाचे कार्य भारताच्या उपग्रहमालिकांची व प्रक्षेपकांची नावे (a) ____ पृथ्वीवरील कुठल्याही ठिकाणाचे भौगोलिक स्थान निश्चित करणे. ____ (b) हवामान उपग्रह ____ ____ (c) ____ ____ IRS प्रक्षेपक : PSLV Complete the following table:Type of the satellite Function of the satellite The names of the Indian satellite series and their launch vehicles (a) ____ Fix the location of any place on the earth's surface ____ (b) Weather satellite ____ ____ (c) ____ ____ IRS; Launcher: PSLV Question 8
Asked once: Mar 2023 (same type asked 3 times)
Q1(A)(v)The height of medium earth orbit above the surface of the earth is:Tap an option to check your answer.
Question 9
Asked once: Mar 2024 (same type asked 3 times)
Q2(B)(iii)उपग्रह प्रक्षेपक म्हणजे काय ? कोणत्याही एका भारतीय उपग्रह प्रक्षेपकाचे नाव लिहा.What is meant by satellite launch vehicle? Name any one Indian satellite launch vehicle.Question 10
Asked once: Mar 2020 (same type asked 2 times)
Q1(B)(v)Name the first artificial satellite sent by Russia in space.