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

Black Hole

Supernova

Neutron Star

2 / 40

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

1 million K

15 million K

5,000 K

3 / 40

What is the Hayashi track?

Evolutionary path of a contracting protostar

A type of stellar wind

A method for measuring stellar parallax

4 / 40

What process powers the Sun and other main sequence stars?

Helium fusion

Carbon fusion

Hydrogen fusion

5 / 40

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

Chromosphere

Photosphere

Corona

6 / 40

How do stars like the Sun eventually end their lives?

As black holes after a supernova

As neutron stars after a gamma-ray burst

As white dwarfs cooling over billions of years

7 / 40

What is the primary source of energy in stars?

Nuclear Fusion

Gravitational Contraction

Nuclear Fission

8 / 40

What is a planetary nebula?

A cloud of gas and dust where stars form

A dense core left behind by a supernova

A shell of gas ejected by a dying star

9 / 40

What is a brown dwarf?

A failed star that never ignites nuclear fusion

A type of supernova remnant

A small, dim star at the end of its life

10 / 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

11 / 40

What causes a star to become a red giant?

Depletion of hydrogen fuel in the core

Accumulation of helium in the core

Loss of mass through solar wind

12 / 40

What determines the main sequence lifetime of a star?

Mass

Luminosity

Temperature

13 / 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

14 / 40

What is a T Tauri star?

A type of black hole

Young, pre-main sequence star with strong stellar winds

End stage of a massive star's life

15 / 40

What is a neutron star primarily composed of?

Neutrons

Hydrogen and helium

Protons and electrons

16 / 40

What is the remnant left after a Type II supernova?

White dwarf

Neutron star or black hole

Planetary nebula

17 / 40

What is a red dwarf?

Small, cool, low-mass star

Massive, hot, high-luminosity star

Giant star in the late stages of its life

18 / 40

What causes a supernova explosion?

Gradual loss of mass over time

Collapse of the core in a massive star

Collision with another star

19 / 40

What is a nova?

Formation of a protostar

Sudden increase in brightness of a white dwarf

Explosion of a massive star

20 / 40

What is the Schwarzschild radius?

Distance from the Sun to the Earth

Radius of the event horizon of a black hole

Radius of a neutron star

21 / 40

What is a white dwarf made of?

Neutron-degenerate matter

Proton-degenerate matter

Electron-degenerate matter

22 / 40

What is the helium flash?

Explosive ignition of helium in a red giant's core

Ejection of a star's outer layers during a nova

Fusion of helium into carbon in a star's core

23 / 40

What is a pulsar?

A type of black hole

A massive star nearing the end of its life

A rotating neutron star emitting beams of radiation

24 / 40

What is a protostar?

A star in the late stages of its life

A newborn star

A collapsing cloud of gas and dust before nuclear fusion ignites

25 / 40

What is the proton-proton chain?

Interaction between protons in a stellar core

Method for detecting exoplanets

Nuclear fusion process in stars like the Sun

26 / 40

What is the Eddington luminosity?

Maximum luminosity a star can have

Luminosity of the Sun

Rate of energy production in a star's core

27 / 40

What is the role of convection in stellar interiors?

Converting hydrogen into helium

Transporting energy from the core to the surface

Creating magnetic fields

28 / 40

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

Electromagnetic force

Nuclear force

Gravity

29 / 40

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

White Dwarf

Neutron Star

Black Hole

30 / 40

What is the Chandrasekhar limit?

Maximum mass for a neutron star

Maximum mass for a stable white dwarf

Minimum mass for nuclear fusion

31 / 40

How are Type Ia supernovae different from Type II supernovae?

Type Ia lack hydrogen lines in their spectra

Type II occur in binary systems

Type Ia are caused by white dwarfs

32 / 40

What is the CNO cycle?

A mechanism for hydrogen burning in stars

A method of stellar classification

A nuclear fusion process in massive stars

33 / 40

What causes a star to become a supernova?

Core collapse or thermonuclear explosion

Loss of mass through solar wind

Accumulation of helium in the core

34 / 40

What is the helium flash?

Fusion of helium into carbon in a star's core

Explosive ignition of helium in a red giant's core

Ejection of a star's outer layers during a nova

35 / 40

What is the Roche limit?

Boundary between a star's core and envelope

Distance from the Sun where water can exist

Distance at which tidal forces exceed gravitational forces

36 / 40

How does a star like the Sun eventually die?

As a white dwarf

As a neutron star

As a black hole

37 / 40

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

Nuclear fission

Gravitational contraction

Nuclear fusion of heavier elements

38 / 40

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

Carbon

Helium

Hydrogen

39 / 40

What is the event horizon of a black hole?

Surface where light can't penetrate

Boundary beyond which nothing can escape

Region of intense gravitational pull

40 / 40

What prevents a star from collapsing under its own gravity?

Pressure from nuclear fusion

Dark matter

Magnetic fields

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