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Author Archives: admin

Inductance of a solenoid derivation

What is the solenoid? The solenoid is defined as:”A long tightly wound cylindrical conducting wire is called solenoid.” Inductance of a solenoid Now we will prove “Inductance of a solenoid derivation”. Consider a solenoid having n turns per unit length.When current passes through the solenoid, magnetic field is produced inside the solenoid which is directed along the axis of the ...

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bohr atomic model and theory for hydrogen atom with postulates

 Bohr’s theory of the  hydrogen atom The Rutherford model of the atom and the experimental formula of atomic spectra helped Bohr is solving the problem of atomic structure.In 1913 he proposed a model for the structure of a hydrogen atom based on his experimental observations.  Bohr atomic model postulates Neil Bohr based his theory of hydrogen atom on the following ...

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sound intensity level and loudness with examples

“Sound energy passing per second through a unit area held perpendicular to the direction of propagation of sound waves is called intensity of sound.”The sound waves transfer energy from the sounding body to the listener.The intensity of sound depends on the amplitude of sound waves.Intensity is a physical quantity and can be measured accurately.The unit of intensity of sound is ...

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Moment of inertia equation and formulas of rigid objects

Moment of inertia is defined as:”The sum of the products of the mass of each particle of the body and square of its perpendicular distance from axis.” Or : The product mass and the square of the perpendicular distance from the axis of rotation is known as moment of inertia.   I = mr² For a rigid body moving about ...

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Difference between density,mass and volume with examples

Mass and density are two physical quantities.Mass is the quantity of matter of an object while density is mass per unit volume.They are two different quantities but these quantities have relationships with each other, higher will be the mass higher will be the density. Now! We are going learn in detail about mass and density. What is mass? The mass of ...

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Examples of transverse and longitudinal waves

All waves can be classified into two kinds: transverse waves, and longitudinal waves.water waves, light waves, rope waves and radio waves are the examples of transverse waves, while sound waves and waves which are produced from vertical oscillating spring under tension are few examples of longitudinal waves. Now! Stay with us to know the examples of transverse and longitudinal waves ...

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Kirchhoff’s voltage and current law with examples

What is Kirchhoff’s Voltage Law? Kirchhoff’s voltage law is a fundamental circuit law that states that the algebraic sum of all the voltages around a closed path is zero or, in other words,the sum of the voltage drops equals the total source voltage. Kirchhoff’s loop rule In an electric circuit, the voltages across the resistors(voltage drops) always have polarities opposite ...

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Difference between electric potential and electric potential energy

Electric potential definition “Electric potential at a point in electric field is the amount of work done to bring the unit positive charge from infinity to that point.” The gravitational potential at point in the gravitational field is the gravitational potential energy of a unit mass placed at that point.In this way ,the electric potential at any point in the ...

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Joules law of heating equation

 State Joule’s law of heating “The heat produced in a conductor is: (1) Directly proportion the square of current passing through the conductor,(H ∝ I²) keeping R and t constant; (2) Directly proportion to the resistance of the conductor (H ∝ R) keeping I and t constant;and (3)Directly proportional to the time of flow of current (H ∝ t) keeping I and R ...

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Types of forces:contact and non contact forces with examples

Fundamental forces of nature Difference between conservative and non conservative forces Frictional forces What is Force? “A force moves or tends to move,stops or tends to stop the motion of object.The force can also change the direction of motion of an object.”It can also change the shape or size of a body on which it acts. In classical physics real ...

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