Why does a star produce its own light and heat?
- Nuclear fission
- Nuclear fusion
- Chemical reaction
- None
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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.
When was Jana Gana Mana adopted as our national anthem?
- 25 January 1950
- 24 January 1950
- 26 January 1950
- 26 November 1949
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On 24 January 1950, ‘Jana Gana Mana’ was adopted as the national anthem.
Who proposed the theory of the expanding universe?
- Georges Lemaitre
- Galileo Galilei
- Edwin Hubble
- Claudius Ptolemy
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American astronomer Edwin Hubble discovered in the 1920s that the Universe is expanding by showing that most galaxies are receding from the Milky Way and the farther away they are, the faster they are receding.
Indian constitutional amendment procedure is:
- Rigid
- Flexible
- Rigid as well as Flexible
- None
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Indian constitution is more flexible than rigid. For example, most of its provisions can be amended by a two-thirds majority in the parliament. However, in order to amend some of the provisions like the election of the president, powers and functions, the extent of Centre-State relations, etc. apart from two-thirds majority in both houses of the parliament, the bill must be passed by at least half of the total state legislatures.
What was the comparative advantage theory of David Ricacrdo?
- When a country can produce a good or service at a lower opportunity cost than another country.
- Pursuit of self-interest, division of labor, and freedom of trade.
- A theory of free-market capitalism directly opposed to government intervention.
- A theory centers on entrepreneurship, knowledge, innovation and technological advancement.
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Comparative advantage is an economy's ability to produce a particular good or service at a lower opportunity cost than its trading partners.
