Q. Consider the following statements regarding the “Primordial Black Holes”:
1. PBHs were formed during the Hot Big Bang phase.
2. PBH can be massively large as 3000kms or be extremely tiny like nucleus of an atom.
Which of the following statements given above is/are NOT correct? 
Answer: D
Notes:
Primordial Black Holes (PBH) were formed during the Hot Big Bang phase.
- PBH can be massively large as 3000kms or be extremely tiny like nucleus of an atom.
- It is believed that they are formed as a result of collapsing radiations as opposed to the collapse of massive stars, which is the case of any other black holes.
- A recent study on Primordial black holes has confirmed that this marginal rise in potential energy resulted in birth of several PBHs and also emitted very powerful gravitational waves.
- Inter University Centre for Astronomy and Astrophysics (IUCAA), has studied primordial black holes that were born as a result of a tiny bump in the potential energy levels of the universe, at a time when it was expanding rapidly.
Source: The Hindu
