Tag: physics

Questions Related to physics

Sun is a/an:

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. Star

  2. Planet

  3. Galaxy

  4. Asteroid

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Correct Option: A
Explanation:

Sun falls in the classification of stars. 

It is the center of solar system.

Why does sun appear larger than other stars to us?

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. It is larger than other stars.

  2. It is farther than other stars.

  3. It is closer than other stars.

  4. It is faster than other stars.

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Correct Option: C
Explanation:

Sun is much closer to us as compared to other stars. Hence, it subtends larger angle at eyes compared to other stars and appear larger. Note that many stars are much larger than sun in size.

Age of sun is about:

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. 4.5 billion years

  2. 45 million years

  3. 10 thousand years

  4. Hundred thousand years

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Correct Option: A
Explanation:

Sun is about 4.5 billion years old. 

It is still younger than many other stars.

Inside the Sun, _______ reactions take place at high temperature and enormous pressure. Fill in the blank
physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. nuclear fusion

  2. nuclear fission

  3. catalyze

  4. none of the above

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Correct Option: A
Explanation:

Nuclear fusion means merging of separate elements as a unified whole to form heavy nuclei resulting in release of enormous amount of energy.

Sun is:

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. a hot ball of glowing gases

  2. a cold rock

  3. a cold sphere of gases and moisture

  4. a solid sphere of minerals

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Correct Option: A
Explanation:

The sun is a star.

A hot ball of glowing gases.

What is the angular size of Sun?

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. $0.5'$

  2. $1.5'$

  3. $0.2'$

  4. $2.5'$

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Correct Option: A
Explanation:

The angluar size of the Sun is 30 arcmin, 

i.e., approx $0.5'$.

How much thick is the photosphere of sun?

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. 500km

  2. 5000km

  3. 50km

  4. 5km

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Correct Option: A
Explanation:

The deepest layer of the Sun is the photosphere. This layer is the thinnest layer comprising of just 500 km in thickness.

From which part of Sun does the energy from nuclear fusion is generated?

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. Core

  2. Radiative Zone

  3. Convective Zone

  4. From both B and C

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Correct Option: A
Explanation:

Central region of the Sun is called the core. Core is where the nuclear reaction takes place. 

Core is the region where the energy from nuclear fusion is generated.

The diameter of Sun is _________times larger than diameter of largest planet Jupiter.

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. 10

  2. 12

  3. 20

  4. 15

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Correct Option: A
Explanation:

The diameter of the Sun is 1.3914 million km, it is 109 times larger than the diameter of the Earth and 10 times larger than Jupiter.

What are known as Sun Spots?

physics movement of the earth properties of stars life cycle of stars solar system and its planets types of galaxies galaxies

  1. Cooler regions on photosphere

  2. Hotter regions on photosphere

  3. Cooler regions on stratosphere

  4. Hotter regions on stratosphere

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Correct Option: A
Explanation:

Spots formed on the surface of the Sun that are darker and cooler are called the Sun's spots.

They may differ in size from small to large also.