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  9. Q18

JKPSC KAS 2021 · Question 18 of 96

What is a white dwarf?

Science & Technology

  1. AIt is a stellar core which remains after the star has used up all of its nuclear fuel.Correct
  2. BIt is the explosion of a star.
  3. CThey are highly compact, magnetized, rotating stars.
  4. DIt is an extremely luminous active galactic nucleus, powered by a supermassive black hole.

Answer: A. It is a stellar core which remains after the star has used up all of its nuclear fuel.

Explanation

A white dwarf is the hot, dense stellar remnant left after a low-to-medium mass star exhausts its nuclear fuel.

Source: JKPSC KAS Prelims 2021 GS via gkscientist.com

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