Home » Author Archives: admin (page 10)

Author Archives: admin

uses of damping devices in machinery

The damping devices are often used on machinery to increase the damping and reduce the vibrational effects caused due to running of machinery.These vibrational effects disturb the whole assembly and the building in which the machinery is working.The vibrational frequency of the machinery may cause the vibrations of large amplitude.To avoid this disturbance ,the damping devices are often used on ...

Read More »

Difference and relationship between stress and strain

Stress It is defined as the force applied on unit area to produce change in the shape,volume or length of a body.Mathematically it is expressed as: The SI unit of stress (σ) is newton per square meter (Nm-2),which is given the name pascal  (pa). Stress may cause a change in length,volume and shape. Tensile stress When a stress  changes the ...

Read More »

Difference between young’s modulus,bulk modulus and shear modulus

Young’s modulus The ratio of tensile stress to tensile  strain is called young’s modulus. Young’s modulus formula Bulk modulus For three dimensional deformation,when volume is involved,then the ratio of applied stress to volumetric strain is called Bulk modulus.Mathematically it is expressed as: Bulk modulus formula Where ΔV is the change in original volume V. Shear modulus The ratio of shear stress ...

Read More »

Maxwell’s equations:Derivation in integral and differential form

Maxwell equations

The 4 Maxwell equations The basic equations of electromagnetism which are collection of Gauss’s law for electricity ,Gauss’s law for magnetism ,Faraday’s law of electromagnetic induction and Ampere’s law for currents in conductors are called Maxwell’s equations. These equations are part of comprehensive and symmetrical theory of electromagnetism,which is essential to understand electromagnetic waves,optics,radio and TV transmission,microwave ovens and magnetically ...

Read More »

Difference between bipolar junction transistor (BJT) & field effect transistor (FET)

The Difference between bjt and fet                            BJT                                  FET 1:BJT (bipolar junction transistor ) is the bipolar device. 1:FET (field effect transistor) is a uni junction transistor. 2:Its operation depends on both ...

Read More »

Difference between mechanical and matter waves with examples

Mechanical waves The waves which required any medium for their propagation are called mechanical waves.  mechanical waves examples Sound waves Water waves Vibration of string Waves produced on the surface of liquid and solid. Ultrasonic waves Spring waves Slinky waves  mechanical waves properties These waves required medium for propagation or to travel. Their speed depend on medium in which it ...

Read More »

Dimensional analysis physics examples and practice problems

Dimensional analysis definition All the physical quantities can be expressed in terms of seven fundamental quantities.The powers to which these fundamental physical quantities be raised are termed as “dimensions”.Using the method of dimensions called dimensional analysis. Each base quantity is considered a dimension expressed by specific symbol written within square brackets.It stands for qualitative nature of physical quantity.For example different ...

Read More »

Difference between dot product and cross product in tabular form

 dot product Vs cross product   Dot product or scalar product  Cross product or vector product If the product of two vectors is a scalar quantity,the product is called scalar product or dot product. If the product of two vectors is a vector quantity then the product is called vector product or cross product. The dot product is defined by ...

Read More »

conservative Vs non conservative forces with examples

What are conservative forces? Those  forces which allows the opportunity of two way conversion among potential and kinetic energies are said to be conservative forces. examples conservative forces Gravitational forces Magnetic force Electrostatic force Elastic spring force Electric force what are non conservative forces? The force is called non conservative if work is done by the force is dependent on ...

Read More »

Resistance in series and parallel circuits

Combinations of resistance in electric circuit There are two possible combinations of resistance in electric circuits: Series combination Parallel combination Series combination In series combination,resistors are connected end to end and electric current has a single path through the circuit.This means that the current passing through each resistor is the same. The current is the same through all points in ...

Read More »