### Quranic Explanation of Singularity

All stars will eventually die. They will either directly collapse on themselves and become black holes, or their remnants will merge with other stars that will eventually become black holes, or if external mass falls into those remnants they will blow up and leave black holes... So black holes are the destiny of most stars. Actually our solar system formed out of debris of a star 100 times more massive than our sun that exploded and became a black hole.

At the center of black holes (collapsed stars) lies a location called the Singularity. An observer far away from a black hole sees the events near a back hole in slow motion. If he shines a beam of light into this black hole he will have to wait forever but still this beam of light will never reach the singularity. The singularity is a location in the future of stars where gravity goes so mad that space and time become indistinguishable. From general relativity we know that this is a location where the structure of spacetime becomes singular (hence the name singularity). However singular (Ahad in Arabic) is one of God's 99 names. In the Quran God swears by the locations of stars which turned out to carry His own name:
[Quran 56.75-77] I swear by the locations of stars, it is a great swear if you knew, it is a noble Quran...
Here God swears not by the stars themselves but rather by their locations (mawakeh in Arabic). Today we know that the future of those locations is singular, that is, they carry God's own name: "Ahad".

### COMMON COLLECTOR CONFIGURATION OF A TRANSISTOR

COMMON COLLECTOR CONNECTION

In  this  configuration  the  input  is  applied  between the  base  and  the  collector and  the  output  is  taken  from  the  collector  and  the  emitter.  Here  the  collector  is common to both the input and the output circuits as shown in Fig.

Common Collector Transistor Circuit

In  common  collector  configuration  the  input  current  is  the  base current  IB  and  the output current is the emitter current IE. The ratio of change in emitter current to the  change in the base current is called current amplification factor.

It is represented by

COMMON COLLECTOR CIRCUIT

A test  circuit  for determining the  static characteristic  of an NPN transistor is shown in Fig. In this circuit the collector is common to both the input and the output circuits.   To   measure   the   base   and   the   emitter   currents,   milli   ammeters   are connected in series with the base and the emitter circuits. Voltmeters are connected   across the input an…