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## Why is the electron volt often a more convenient unit of energy than a joule?

Both electron volt and joule are the units of energy.Since energies at atomic level are very small and are expressed in electron volt rather than Joule because Joule is a bigger unit.Hence the unit electron volt for energy is more convenient than joule,when we are dealing with atoms and nuclei to express the energy.

## Difference between mutual and self induction

What is Mutual induction? “The process of inducing e.m.f in the secondary coil by changing the magnetic flux of the primary coil with the help of varying current through it is called mutual induction.” If two coils placed together ,then by changing current in one coil sets up a changing magnetic field in the other coil,so induced an e.m.f in ...

## biot savart law

What is the definition of biot savart law? “The magnetic induction at any point produced by current element is directly proportional to the product of the current and the differential element and inversely proportional to the square of distance of the point from the differential element.” Formula of Biot Savart law: Derivation of Biot Savart law: To explain the Biot ...

## Difference between gas turbine and steam turbine

Idea of gas turbine is very old one,its working principle is an advanced version of wind mill.To achieve efficient working of turbine,the movement of  gas is controlled and directed to blades.The air which is under pressure supplied to turbine by air compressor. In gas turbine initially the air is obtained from atmosphere and compressed in air compressor.The air which is ...

## Difference between mass and weight

Unfortunately,weight and mass are often considered to be same quantities and misused in daily conversations.It is therefore essential for you to differentiate between these two physical quantities. Weight and mass difference: Properties of mass: Mass is the quantity of matter possessed by a body. It is a scalar quantity,which has magnitude only. Its unit is kilogram (kg). It is not ...

## newton’s rings experiment with animation

Newton’s Ring: Newton’s rings is a process in which Circular bright and dark fringes obtained due to air film enclosed between a Plano convex lens and a glass plate. An air wedge film can be formed by placing a plano-convex lens on a flat glass plate.The thickness of film is zero where the lens and the plate are in contact ...

## Difference between impulse turbine and reaction turbine?

Comparison between Impulse turbine and a reaction turbine: Following are the some points of comparison between an impulse and reaction turbine. Impulse Turbines: In impulse turbine steam flows through nozzle and impinges in moving blades. The steam hits on the buckets with Kinetic energy. The steam pressure remains constant. Their relative velocity remains constant. Blades are symmetrical. Number of stages ...

## Difference between diesel and petrol engine

Diesel Engine: Diesel engine only draws air during suction stroke. The fuel is injected in the form of fine spray. Combustion of fuel takes place at constant pressure. The diesel engine are heavier and costlier. Starting of diesel engine is difficult due to high compression ratio. The maintenance cost of it is large. They are low speed engines. They are ...