Either it is a solid or liquid matter, there exists a basic property called elasticity in it. When the solid or liquid matter is subjected to pressure on all surfaces its elastic property changes referred to as the Bulk Modulus.
Bulk module is exactly defined as the capacity of a substance to withstand changes in volume when subjected to compression on all sides. It is dependent on the total pressure applied and the relative deformation of the substance.
Deformation is referred to as the strain and is measured by the change in the volume after application of pressure divided by the original volume.
Bulk modulus is defined as
Bulk modulus = pressure / strain
= P / (Vo – Vn) / Vo
Vo – Vn = change in the volume
P = Pressure
Vo = original Volume
Another important and fundamental concepts of physics is Electricity and Magnetism. This concept explains clearly the generation of electricity and magnetism.
Electricity is generated by the movement of electric charges like electrons in the conductors like copper wires. Electricity is also referred to as electrical energy. Electricity can also be created when the magnet passes close to the metal wire generating the magnetic field known as magnetism.
Magnetism explains the fundamental interactions in nature, the interaction between moving charges – electrons.
The concept of magnetism is completely dependent on electricity and cannot be generated without the presence of electricity.
Electricity is the independent concept that does not require a magnetic field or the effect of magnetism.
Conductors are the elements that conduct or allows electricity to pass through it. Gold, copper, and silver are examples of good conductors. These materials have a few loosely bound electrons in their outer orbits that helps to pass electricity through it. Since copper is affordable material it is widely used everywhere.
Materials which does not conduct or allow electricity to pass through it are referred to as insulators. Glass, plastic and ceramic are examples for good insulators. Due to the absence of the free electrons inside the material, electricity cannot be passed through it.
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