Diffraction of light and resolving power of an optical instrument
Diffraction of light Diffraction of light is the phenomenon of bending of light waves…
Photoelectric effect
The phenomenon of emission of electrons by certain metal , when it is exposed to radia…
p-type semiconductor & n-type semiconductor
p-type semiconductor When trivalent impurity like indium,boron, aluminium etc is added…
Intrinsic semiconductor
A pure semiconductor is called as intrinsic semiconductor Number of holes and electron…
Advantages of semiconductor devices
1. They are very small in size and light in weight 2. They do not get heat up easily a…
Principle of solar cell and uses of it
Solar cell is also known as a photovoltaic cell, that converts light energy into elect…
What are isotones, isobars & isotopes
Isotones The nuclei having same number of neutrons (A-Z) but different atomic numbers …
Define 1 Henry
The coefficient of self induction is said to be one henry , if e.m.f. of one volt is i…
What is wattless current?
Current flowing in a circuit without any net dissipation of power is called as wattles…
What is electromagnetic induction?
The phenomenon of producing an induced e.m.f. in a coil or a conductor due to changing…
CHARACTERISTICS OF GRAVITATIONAL FORCE
CHARACTERISTICS OF GRAVITATIONAL FORCE 1.It is always attractive in nature. 2. It obey…
Cohesive Force and Adhesive Force
Cohesive Force of attraction between the molecule of the same substance is called as …
Definition of plastic body & elastic body
Plastic body The bodies which do not regain their original dimensions after removal of…
Poisson's Ratio & its unit
The ratio of lateral strain to longitudinal strain is called as poisson's ratio. …
What is a perfect black body ?
A body that absorbs the entire radiation energy incident on it is called a…
Thermodynamics involved in a pressure cooker
Pressure cooker is a very common device used in cooking food by consuming …