Why does a star produce its own light and heat?

Q. 2 of Quiz-1849 (Que-ID : 3992)

Why does a star produce its own light and heat?

Nuclear fission
Nuclear fusion
Chemical reaction
None

Ans → (b)Nuclear fusion

Explanation → Stars are huge celestial bodies made mostly of hydrogen and helium. Heat and light energy produced by the stars are due to the fusion reaction of hydrogen atoms.

Q. 1 of Quiz-1849 (Que-ID : 3991)

Name the branch of astronomy that involves the origin and evolution of the universe.

Cosmology
Meteorology
Petrology
Orology

Discuss View Answer

Q. 2 of Quiz-1849 (Que-ID : 3992)

Why does a star produce its own light and heat?

Nuclear fission
Nuclear fusion
Chemical reaction
None

Discuss View Answer

Q. 3 of Quiz-1849 (Que-ID : 3993)

Which theory explains the origin of the universe?

Geocentric Model
Heliocentricity
Big Bang Theory
Pulsating Theory

Discuss View Answer

Q. 4 of Quiz-1849 (Que-ID : 3994)

Big bang theory was proposed by

Georges Lemaitre
Hermann Bondi
Thomas Gold
Hoyle

Discuss View Answer

Q. 5 of Quiz-1849 (Que-ID : 3995)

Who proposed the theory of the expanding universe?

Georges Lemaitre
Galileo Galilei
Edwin Hubble
Claudius Ptolemy

Discuss View Answer

Q. 6 of Quiz-1849 (Que-ID : 3996)

Who proposed the steady-state theory?

Hermann Bondi
Thomas Gold
Sir James Jeans
Fred Hoyle

Discuss View Answer

Q. 7 of Quiz-1849 (Que-ID : 3997)

What is the pulsating theory of the universe?

A cosmological model that combines both the Big Bang and the Big Crunch as part of a cyclical event
An expansion and contraction of the star as a whole in a regular periodic pulsation
All the matter of the universe was present in a single place in the form of hot and dense fireball
Counting of the galaxies is constant and new galaxies which are forming continuously are filling the empty spaces

Discuss View Answer

Q. 8 of Quiz-1849 (Que-ID : 3998)

What Are Constellations?

A group of stars that appears to form a pattern or picture
Small chunks of ice and rock come from the outer edge of the solar system
Collection of billions of stars
Small irregularly shaped rocks made up of metal or minerals

Discuss View Answer

Q. 9 of Quiz-1849 (Que-ID : 3999)

In which of these constellations does the current Pole Star, Polaris, lie?

Ursa Minor
Orion
Ursa Major
Corona Borealis

Discuss View Answer

Q. 10 of Quiz-1849 (Que-ID : 4000)

Where in the sky would the Pole Star appear to an observer situated on the North Pole?

At a fixed point on the horizon
Perpetually below the horizon and invisible
It depends on the time of the year
At the zenith (exactly overhead)

Discuss View Answer

Q. 6 of Quiz- (Que-ID : 1950)

Who coined the slogan 'Quit India'?

Mahatma Gandhi
Pt.Jawaharlal Nehru
Yusuf Meher Ali
Aruna Asaf Ali

Discuss View Answer

Q. 1 of Quiz- (Que-ID : 4001)

Who is considered as the father of economics?

Alfred Marshall
Adam Smith
David Ricardo
Esther Duflo

Discuss View Answer

Directions : (For Q.No. 3)
In a Class of five Students P, Q, R, S, and T, only one student is known to have copied in the exam. The disciplinary committee has investigated the situation and recorded the statements from the students as given below-
Statement of P: R has copied in the exam.
Statement of Q: S has copied in the exam.
Statement of R: P did not copy in the exam.
Statement of S: Only one of us is telling the truth.
Statement of T: R is telling the truth,
The investigating team had authentic information that S never lies.

Q. 3 of Quiz- (Que-ID : 4602)