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State PCS PYQPrelims 2023

BPSC – Combined Competitive Examination · Question 9

In the universe, what are pulsars?

  1. A group of stars
  2. Rotating neutron stars
  3. Explosion of a star
  4. Radio waves emitted by a star
Show answer & explanation

Answer: (B) Rotating neutron stars

Explanation

Pulsars are neutron stars whose beams sweep past Earth like a lighthouse, producing regular pulses.

  • (A) Incorrect

    Wrong: that is a cluster.

  • (B) Correct

    Correct: pulsars are rapidly spinning, highly magnetised neutron stars emitting beams.

  • (C) Incorrect

    Wrong: that is a supernova.

  • (D) Incorrect

    Wrong: pulsars emit such waves, but they are the stars themselves.