Home » Author Archives: admin (page 2)

Author Archives: admin

Difference between forward bias and reverse bias of semiconductor diode

The difference between forward bias and reverse bias is that in forward biasing positive terminal of the battery is connected with p-type and negative terminal is connected with n-type of semiconductor,while in reverse biasing positive terminal of battery is connected with n-type and negative terminal is connected with p-type. The bias a diode,you apply a dc voltage across it. Forward ...

Read More »

Newton’s three laws of motion with examples and applications

Newton’s three laws of motion are the 3 physical laws ,these laws of motion laid the foundation for classical mechanics.These laws explain the relation between forces and the body on which these forces acted upon.Newton’s first law of motion gives the qualitatively definition of force,Newton’s second law of motion gives the quantitative measure of the force,while Newton’s third law of ...

Read More »

What is difference between step up and step down transformer?

Transformer is an electrical device which is used to step up or step down ac voltage.There are two types of transformer,step up and step down.The difference between step up and step down transformer is that step up transformer increases the input voltage and step down transformer decreases the input voltage. Step up transformer If (Ns greater than NP) and (Vs is greater ...

Read More »

Magnetic hysteresis loop for ferromagnetic materials

The value of flux density for any value of current is always greater when the current is decreasing ,then when it is increasing magnetism lags behind the magnetizing current.This process is known as hysteresis. Hysteresis Loop definition To investigate a ferromagnetic material, a bar of that material such as iron is placed in an alternating current solenoid. When the alternating ...

Read More »

Discuss analogies and differences between Gauss’s law and ampere’s law

Analogies between Gauss’s law and Ampere’s law Gauss’s law says the electric flux through a closed surface is proportional to the charge within the surface.Ampere’s law says the line integral of B.ds around a close path is proportional to the current that passes through that path. In Gauss’s law,the imaginary and arbitrary closed surface is taken enclosing a charge.In ampere’s ...

Read More »

Scientific notation and significant figures

Scientific notation and significant figures are two important terms in physics.In scientific notation numbers are expressed by some power of ten multiplied by a number between 1 and 10,while significant figures are accurately known digits and first doubtful digit in any measurement.  Scientific notation definition In scientific notation a number is expressed as some power of ten multiplied by a ...

Read More »

Newton’s first law of motion examples in our daily life

Newton’s first law of motion examples are given in the list: A book lying on the table remains at rest as long as no net force acts on it. A moving object does not stop moving by itself. A rolling ball on rough surface or ground stops earlier than on smooth surface,because rough surfaces offer more friction than smooth surface.If ...

Read More »

Difference between plane wave and spherical wave with examples

The basic difference between plane wave and spherical wave is that in plane wave disturbances propagated in single direction like string wave, while in spherical waves disturbances propagated outward in all directions from the source of wave.Light waves is an example of spherical wave. Plane waves In a plane wave disturbances travel in the single direction. Plane waves examples For ...

Read More »

Difference between stress and strain in tabular form

The basic difference between stress and strain is that stress is the deforming force per unit area.Its unit is same as pressure which is N/m²,While strain is the apparent change in the shape,volume or length of object caused due to stress is called strain.Strain has no unit. Stress It is defined as the force applied on unit area to produce ...

Read More »

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

The basic difference between young’s modulus,bulk modulus and shear modulus is that Young’s modulus is the ratio of tensile stress to tensile strain,bulk modulus is the ratio of volumetric stress to volumetric strain and shear modulus is the ratio of shear stress to shear strain. Young’s modulus The ratio of tensile stress to tensile  strain is called young’s modulus. Young’s ...

Read More »