Stellar Structure and Evolution MCQs with Answers

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Stellar Structure and Evolution Online Quiz

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• Test Name: Stellar Structure and Evolution MCQ Quiz Practice
• Type: Quiz Test
• Total Questions: 40
• Total Marks: 40
• Time: 40 minutes

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Stellar Structure and Evolution

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1 / 40

What is a planetary nebula?

A cloud of gas and dust where stars form

A shell of gas ejected by a dying star

A dense core left behind by a supernova

2 / 40

What is a brown dwarf?

A type of supernova remnant

A small, dim star at the end of its life

A failed star that never ignites nuclear fusion

3 / 40

What is a red dwarf?

Massive, hot, high-luminosity star

Small, cool, low-mass star

Giant star in the late stages of its life

4 / 40

What is a pulsar?

A type of black hole

A rotating neutron star emitting beams of radiation

A massive star nearing the end of its life

5 / 40

How does a star like the Sun eventually die?

As a white dwarf

As a black hole

As a neutron star

6 / 40

What is the remnant left after a Type II supernova?

White dwarf

Planetary nebula

Neutron star or black hole

7 / 40

What causes a supernova explosion?

Gradual loss of mass over time

Collision with another star

Collapse of the core in a massive star

8 / 40

What is the event horizon of a black hole?

Surface where light can't penetrate

Region of intense gravitational pull

Boundary beyond which nothing can escape

9 / 40

What is the primary source of energy in stars?

Gravitational Contraction

Nuclear Fission

Nuclear Fusion

10 / 40

What is the CNO cycle?

A nuclear fusion process in massive stars

A method of stellar classification

A mechanism for hydrogen burning in stars

11 / 40

What is the proton-proton chain?

Nuclear fusion process in stars like the Sun

Method for detecting exoplanets

Interaction between protons in a stellar core

12 / 40

What determines the main sequence lifetime of a star?

Mass

Luminosity

Temperature

13 / 40

What is the primary energy source in the later stages of a massive star's life?

Nuclear fusion of heavier elements

Gravitational contraction

Nuclear fission

14 / 40

What causes a star to become a red giant?

Depletion of hydrogen fuel in the core

Loss of mass through solar wind

Accumulation of helium in the core

15 / 40

What is a T Tauri star?

End stage of a massive star's life

A type of black hole

Young, pre-main sequence star with strong stellar winds

16 / 40

What is the final stage of stellar evolution for a star like the Sun?

White Dwarf

Neutron Star

Black Hole

17 / 40

How do stars like the Sun eventually end their lives?

As neutron stars after a gamma-ray burst

As black holes after a supernova

As white dwarfs cooling over billions of years

18 / 40

Which layer of a star's atmosphere is visible during a solar eclipse?

Chromosphere

Photosphere

Corona

19 / 40

What is the Hayashi track?

A method for measuring stellar parallax

A type of stellar wind

Evolutionary path of a contracting protostar

20 / 40

What is the Chandrasekhar limit?

Maximum mass for a stable white dwarf

Maximum mass for a neutron star

Minimum mass for nuclear fusion

21 / 40

What is the Schwarzschild radius?

Radius of the event horizon of a black hole

Radius of a neutron star

Distance from the Sun to the Earth

22 / 40

What is a neutron star primarily composed of?

Protons and electrons

Neutrons

Hydrogen and helium

23 / 40

What is a white dwarf made of?

Neutron-degenerate matter

Electron-degenerate matter

Proton-degenerate matter

24 / 40

What is a nova?

Sudden increase in brightness of a white dwarf

Explosion of a massive star

Formation of a protostar

25 / 40

What is the Eddington luminosity?

Rate of energy production in a star's core

Luminosity of the Sun

Maximum luminosity a star can have

26 / 40

What is the fate of a star with a mass greater than about 8 solar masses?

Black Hole

Neutron Star

Supernova

27 / 40

What is the helium flash?

Ejection of a star's outer layers during a nova

Fusion of helium into carbon in a star's core

Explosive ignition of helium in a red giant's core

28 / 40

What is the approximate temperature at the core of the Sun?

1 million K

15 million K

5,000 K

29 / 40

What is the helium flash?

Fusion of helium into carbon in a star's core

Ejection of a star's outer layers during a nova

Explosive ignition of helium in a red giant's core

30 / 40

What causes a star to become a supernova?

Accumulation of helium in the core

Loss of mass through solar wind

Core collapse or thermonuclear explosion

31 / 40

What prevents a star from collapsing under its own gravity?

Magnetic fields

Pressure from nuclear fusion

Dark matter

32 / 40

What is the Roche limit?

Distance at which tidal forces exceed gravitational forces

Boundary between a star's core and envelope

Distance from the Sun where water can exist

33 / 40

What is the role of fusion in stellar interiors?

Creating new elements through nuclear reactions

Shielding the star from radiation

Generating energy and counteracting gravitational collapse

34 / 40

What is the helium flash?

Fusion of helium into carbon in a star's core

Ejection of a star's outer layers during a nova

Explosive ignition of helium in a red giant's core

35 / 40

Which force is responsible for keeping a star in hydrostatic equilibrium?

Gravity

Nuclear force

Electromagnetic force

36 / 40

What is the dominant element in a star's core during the main sequence phase?

Hydrogen

Carbon

Helium

37 / 40

What is a protostar?

A newborn star

A collapsing cloud of gas and dust before nuclear fusion ignites

A star in the late stages of its life

38 / 40

What process powers the Sun and other main sequence stars?

Hydrogen fusion

Helium fusion

Carbon fusion

39 / 40

What is the role of convection in stellar interiors?

Transporting energy from the core to the surface

Creating magnetic fields

Converting hydrogen into helium

40 / 40

How are Type Ia supernovae different from Type II supernovae?

Type II occur in binary systems

Type Ia lack hydrogen lines in their spectra

Type Ia are caused by white dwarfs

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