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Author Archives: admin

What is the difference between average and instantaneous velocity?

Instantaneous velocity: “If a body covers small displacement in in small interval of time than its velocity will be instantaneous velocity such that Δt is equal to zero.”Where Δt is the small interval of time.Average velocity does not tell us about the motion between two points on the path.The path may be straight or curved and the motion may be steady or ...

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What is difference between angular and tangential velocity?

Angular velocity “Time rate of change of angular displacement is known as angular velocity.”It is denoted by ω,its formula is given by: Unit of angular velocity is radian per second (rad s-1) . Very often we are interested in knowing how fast or how slow a body is rotating.It is determined by its angular velocity which is defined as the rate ...

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What is the difference between orbital and escape velocity?

Relation between escape velocity and orbital velocity formula What is the Escape velocity ? “The velocity required by a body to escape from the earth’s gravitational field.”It is our daily life experience that  an object projected upward comes back to the ground after rising to a certain height.This is due to the force of gravity acting downward.With increased initial velocity,the ...

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law of conservation of momentum formula & examples in real life

Conservation of momentum: “The momentum of an isolated system of two or more than two interacting bodies remains constant.”Momentum of a system depends on its mass and velocity.A system is a group of bodies within certain boundaries .An isolated system is a group of interacting bodies on which no external force is acting.If no unbalanced or net force acts on ...

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Difference between stable,unstable & neutral equilibrium with examples

Types  of equilibrium in physics There are three states or types  of equilibrium in physics Stable equilibrium Unstable equilibrium Neutral equilibrium Stable equilibrium “A body is said to be in stable equilibrium if after a slight tilt it returns to its previous position.” Consider a book lying on the table.Tilt the book slightly about its one edge by lifting it ...

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difference between centre of mass and centre of gravity with examples

Centre of Mass “Centre of mass of a system is such a point where an applied force causes the system to move without rotation” It is observed that the centre of mass of a system moves as if its entire mass is confined at that point. A force applied at such a point in the body does not produce any ...

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Total internal reflection:conditions,uses and examples

Total Internal Reflection One of the qualities of any optically transparent material is the speed at which light travels within the material, i.e., it depends upon the refractive index n of the material. The index of refraction is merely the ratio of the speed of light c in vacuum to the speed of light v in that material.Expressed mathematically: n=c ...

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Diffraction grating:Formula,theory,experiment & applications

Diffraction grating definition “The diffraction grating is a useful device for analyzing light sources.It consists of a large number of equally spaced parallel slits.”Its working principle is based on the phenomenon of diffraction.The space between lines act as slits and these slits diffract the light waves thereby  producing a large number of beams which interfere in such a way to ...

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what is the difference between p type and n type semiconductors?

Difference between n type and p type semiconductors? Depending on the type of doping material used ,extrinsic semiconductors can be further subdivided into two classes: N- type semiconductors P-type semiconductors N-type semiconductors: This type of semiconductor is obtained when a pentavalent material like antimony (Sb) is added to pure germanium crystal.fig Each antimony atom forms covalent bonds with the surrounding ...

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Difference between conductors and insulators with examples

Conductors A conductor is a material that easily conducts electrical current.Most metals are good conductors.The best conductors are single element materials,such as copper(Cu),silver(Ag),gold(Au),which are characterized by atoms with only one valence electron very loosely bound to the atom.These loosely bound valence electrons become free electrons.Therefore,in a conductive material the free electrons are valence electrons. In terms of energy bands ,it ...

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