Galvanometer is very sensitive device. Flow of huge amount current can burn galvanometer or displaces spring of it. For saving galvanometer a small value parallel resistor is connected across it and makes another way out of flowing current. Parallelly connected resistor is called shunt. Total current divides into two ways. Maximum current flows through shunt resistor due to low … [Read more...] about Electrical Shunt
Physics
What Is the First Law of Thermodynamics? (Theory)
Scientist Rumford and Joule did experiment in thermodynamics. In 1847 Joule showed relation between heat and mechanical energy. He explained from his experiment when work done is converted to heat and heat is converted into work done fully. So work done and heat are proportional each other. This is the first law of thermodynamics. … [Read more...] about What Is the First Law of Thermodynamics? (Theory)
What is entropy
Suppose in a football game a player always makes foul. So the other good players cannot concentrate in the game and referee also. The foul making player breaks the discipline of playing. So the total game cannot be conducted properly. Similarly increase or decrees of oxygen level in the environment both are difficult for human being. In that two cases are disorderliness or … [Read more...] about What is entropy
Intrinsic and extrinsic semiconductors basic concepts
There are two types of semiconductors (i) Intrinsic or pure semiconductor (ii) Extrinsic or impure semiconductor … [Read more...] about Intrinsic and extrinsic semiconductors basic concepts
Basic Concepts of Band Theory
An atom has electron, protons and neutrons. According to the Bohr’s atomic model theory nucleus of an atom contains protons and neutrons. Neutrons has no charge and protons have positively charged electrons moves around the nucleus in different orbits far away from this nucleus. … [Read more...] about Basic Concepts of Band Theory
