CBSE Class 10 Physics Space Physics MCQs Set 25

Physics Objective Questions and Answers: Space Physics

Access targeted multiple-choice questions for Space Physics designed to align with the latest CBSE academic syllabus for Class 10 Physics. These objective practice sets help students evaluate their conceptual understanding and improve exam readiness.

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Navigate directly to the 50 objective questions for Space Physics using the digital viewer below. Each practice set includes verified answer keys, allowing students to instantly cross-check their work and identify areas requiring further revision.

Multiple Choice Questions

Question 1: The first living creature to orbit the Earth was a
(a) rabbit named Bunny
(b) cat named Kitty
(c) dog named Laika
(d) monkey named Albert
Show Answer & Explanation

Answer: (c) dog named Laika

Explanation:
1. The dog Laika was sent aboard Sputnik-2 in 1957.

Teacher's Note:
1. She was the first animal to orbit the Earth.

Question 2: Who among the following gave the geocentric model of the universe?
(a) Einstein
(b) Newton
(c) Hipparchus
(d) Ptolemy
Show Answer & Explanation

Answer: (d) Ptolemy

Explanation:
1. In the geocentric model the Earth is at the centre and the Sun, Moon and planets revolve around it.
2. Ptolemy presented this model.

Teacher's Note:
1. Copernicus later proposed the heliocentric model with the Sun at the centre.

Question 3: Which technology is used in a GSLV engine, which maintains liquefied fuel at very low temperatures?
(a) refrigenic
(b) pyrogenic
(c) cryogenic
(d) autogenic
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Answer: (c) cryogenic

Explanation:
1. Cryogenic engines use liquid hydrogen and liquid oxygen kept at extremely low temperatures.
2. These give the large thrust needed to place heavy satellites in orbit.

Teacher's Note:
1. Cryo means very cold.

Question 4: Which is the Indian astrophysicist after whom an X-ray telescope has been named?
(a) Arya Bhatt
(b) Subrahmanyan Chandrasekhar
(c) Jayant Vishnu Narlikar
(d) Bhaskaracharya
Show Answer & Explanation

Answer: (b) Subrahmanyan Chandrasekhar

Explanation:
1. NASA's Chandra X-ray Observatory is named after Subrahmanyan Chandrasekhar.
2. He is known for the Chandrasekhar limit of about 1.4 times the mass of the Sun.

Teacher's Note:
1. He received the Nobel Prize in Physics in 1983.

Question 5: Which planet has the highest gravitational force in the solar system?
(a) Neptune
(b) Jupiter
(c) Saturn
(d) Mars
Show Answer & Explanation

Answer: (b) Jupiter

Explanation:
1. Jupiter is the most massive planet, with more than twice the mass of all the other planets together.
2. So its surface gravity is the highest.

Teacher's Note:
1. Jupiter's gravity at the cloud tops is about 2.5 times that of the Earth.

Question 6: Who was the first person to go into space?
(a) Yuri Gagarin
(b) Alan Shepard
(c) Edwin Aldrin
(d) Neil Armstrong
Show Answer & Explanation

Answer: (a) Yuri Gagarin

Explanation:
1. Yuri Gagarin of the Soviet Union orbited the Earth aboard Vostok-1 in April 1961.

Teacher's Note:
1. Alan Shepard was the first American in space.

Question 7: A black hole is
(a) a hole in the troposphere
(b) a hole in the ozone layer of the atmosphere
(c) a hole in the Earth's centre
(d) highly dense matter present in the universe
Show Answer & Explanation

Answer: (d) highly dense matter present in the universe

Explanation:
1. A black hole is an extremely dense object left behind by the collapse of a massive star.
2. Its gravity is so strong that nothing can escape from it.

Teacher's Note:
1. It is not a hole in anything; it is concentrated mass.

Question 8: The mass of the Sun is of the order of
(a) 10\( ^{30} \) kg
(b) 10\( ^{24} \) kg
(c) 10\( ^{27} \) kg
(d) 10\( ^{20} \) kg
Show Answer & Explanation

Answer: (a) 10\( ^{30} \) kg

Explanation:
1. The mass of the Sun is about 2 \( \times \) 10\( ^{30} \) kg.
2. This is about 3 lakh times the mass of the Earth (6 \( \times \) 10\( ^{24} \) kg).

Teacher's Note:
1. The Sun holds more than 99% of the mass of the solar system.

Question 9: A light year is a unit of
(a) time
(b) speed of light
(c) distance
(d) mass
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Answer: (c) distance

Explanation:
1. One light year is the distance travelled by light in vacuum in one year.
2. It is about 9.46 \( \times \) 10\( ^{15} \) m.

Teacher's Note:
1. The word 'year' misleads many students into choosing time.

Question 10: Which is the incorrect statement about the planet Venus?
(a) it is also called the 'morning star' or 'evening star'
(b) it is the brightest planet visible from the Earth
(c) its rotation is retrograde, i.e. clockwise unlike the Earth
(d) it rotates faster on its axis than the Earth
Show Answer & Explanation

Answer: (d) it rotates faster on its axis than the Earth

Explanation:
1. Venus rotates very slowly, taking about 243 Earth days to turn once on its axis.
2. The Earth rotates much faster, so the statement is incorrect.

Teacher's Note:
1. Venus has retrograde rotation and a very dense CO\( _2 \) atmosphere.

Question 11: Which is the first satellite designed and constructed in India?
(a) APPLE
(b) Rohini
(c) Aryabhata
(d) Bhaskara
Show Answer & Explanation

Answer: (c) Aryabhata

Explanation:
1. Aryabhata was launched in 1975 and was India's first satellite.

Teacher's Note:
1. It was launched from the Soviet Union.

Question 12: Who was the first woman to go into space?
(a) Valentina Tereshkova
(b) Maria Sharapova
(c) Sunita Williams
(d) Kalpana Chawla
Show Answer & Explanation

Answer: (a) Valentina Tereshkova

Explanation:
1. Valentina Tereshkova of the Soviet Union flew in Vostok-6 in 1963.

Teacher's Note:
1. She is the first woman in space.

Question 13: Which geostationary satellite was launched for the purpose of extending education in India?
(a) EDUINDIA
(b) EDUSAT
(c) IGNOU
(d) TEACHINDIA
Show Answer & Explanation

Answer: (b) EDUSAT

Explanation:
1. EDUSAT, launched in 2004, was dedicated to educational services.

Teacher's Note:
1. It was India's first thematic satellite.

Question 14: Which one of the following statements about shooting stars is incorrect?
(a) they are meteors
(b) they emit light due to extremely high temperature caused by friction as they pass through the Earth's atmosphere
(c) they are debris separated from a comet
(d) they are a kind of star
Show Answer & Explanation

Answer: (d) they are a kind of star

Explanation:
1. A shooting star is a meteor, a small rock that burns up in the atmosphere.
2. It is not a star, so the last statement is incorrect.

Teacher's Note:
1. Meteors that reach the ground are called meteorites.

Question 15: The Milky Way is
(a) a sun
(b) a planet of our solar system
(c) one of the solar systems
(d) one of the galaxies of the universe
Show Answer & Explanation

Answer: (d) one of the galaxies of the universe

Explanation:
1. A galaxy is a huge collection of stars, gas and dust held together by gravity.
2. The Milky Way is the galaxy that contains our solar system.

Teacher's Note:
1. The universe has billions of galaxies.

Question 16: Which is the first remote sensing satellite developed in India?
(a) Rohini
(b) INSAT-1B
(c) IRS-1A
(d) Bhaskara
Show Answer & Explanation

Answer: (c) IRS-1A

Explanation:
1. IRS-1A, launched in 1988, began the Indian Remote Sensing satellite series.

Teacher's Note:
1. Remote sensing satellites are used for mapping resources and monitoring crops.

Question 17: Sunlight takes nearly 8 minutes to reach the Earth. The distance of the Sun from the Earth is about (speed of light = 3 \( \times \) 10\( ^8 \) m/s)
(a) 1.44 \( \times \) 10\( ^5 \) km
(b) 2.4 \( \times \) 10\( ^6 \) km
(c) 1.44 \( \times \) 10\( ^8 \) km
(d) 2.4 \( \times \) 10\( ^{10} \) km
Show Answer & Explanation

Answer: (c) 1.44 \( \times \) 10\( ^8 \) km

Explanation:
1. Time = 8 \( \times \) 60 = 480 s.
2. Distance = 3 \( \times \) 10\( ^8 \) \( \times \) 480 = 1.44 \( \times \) 10\( ^{11} \) m.
3. = 1.44 \( \times \) 10\( ^8 \) km.

Teacher's Note:
1. Convert metres to kilometres by dividing by 1000.

Question 18: Which of the following units is the largest?
(a) astronomical unit (A.U.)
(b) parsec
(c) light year
(d) fermi
Show Answer & Explanation

Answer: (b) parsec

Explanation:
1. 1 A.U. = 1.496 \( \times \) 10\( ^{11} \) m.
2. 1 light year = 9.46 \( \times \) 10\( ^{15} \) m.
3. 1 parsec = 3.26 light years = 3.08 \( \times \) 10\( ^{16} \) m. The fermi (10\( ^{-15} \) m) is tiny.

Teacher's Note:
1. Order: fermi < A.U. < light year < parsec.

Question 19: Which satellite was renamed Kalpana-1 in honour of Kalpana Chawla?
(a) METSAT
(b) IRS-1A
(c) Rohini
(d) INSAT-1B
Show Answer & Explanation

Answer: (a) METSAT

Explanation:
1. METSAT, India's first dedicated meteorological satellite, was renamed Kalpana-1 in 2003.

Teacher's Note:
1. Meteorological satellites help in weather forecasting.

Question 20: The surface temperature is maximum for a
(a) red star
(b) blue star
(c) yellow star
(d) green star
Show Answer & Explanation

Answer: (b) blue star

Explanation:
1. The colour of a star shows its temperature.
2. Blue stars are the hottest, followed by white, yellow, orange and red.

Teacher's Note:
1. Our Sun is a yellow star with a surface temperature of about 5800 K.

Question 21: There is no atmosphere on the Moon because
(a) there is vacuum in space
(b) the diffusion constant of gases is high
(c) the escape velocity at its surface is very low
(d) there is no vegetation
Show Answer & Explanation

Answer: (c) the escape velocity at its surface is very low

Explanation:
1. The Moon's gravity is weak (about one sixth of the Earth's).
2. The escape velocity is only about 2.4 km/s, so gas molecules escape into space.

Teacher's Note:
1. A planet keeps an atmosphere only if its escape velocity is large enough.

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Space Physics Objective Questions & Solutions for Class 10 Physics

Chapter MCQs with Answers for Class 10 Physics

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FAQs

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