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Grouping of Cells Grouping of Cells :- It isn’t possible to make voltage sources and batteries for each specific voltage requirement. When a different voltage is necessary, two or more voltage sources(cells/batteries) are used in different combinations to produce the desired value of voltage and current. These cells can be connected in two basic types…
No of Images Formed by Two Plane Mirrors No of Images Formed by Two Plane Mirrors depends on the position of mirrors with respect to each others and also on the position of object between the mirrors. Let us discuses different positions of mirrors:- Case (I) – Image Formation by Parallel Plane Mirrors…
Refraction of Sound Waves Refraction of Sound Waves :- Refraction of sound waves refers to the bending of sound waves as they pass from one medium into another, where the speed of sound differs. This bending occurs due to the change in the speed of sound between the two mediums, causing the direction of…
Reflection of Sound | Reflection of Waves Reflection of Sound | Reflection of Waves :- In this article, we are going to study about the reflection of waves (transverse and longitudinal) at the boundary of the denser medium and rarer medium. When a wave travelling in a homogeneous medium strikes an interface separating two…
Factors Affecting Speed of Sound Factors Affecting Speed of Sound :- Several factors affect the speed of sound in a medium like air :- (1) Effect of temperature For a gas γ & MW are constant and hence from , we get Here vt is velocity of sound at t °C and vo is…
Laplace Correction Laplace Correction :- Laplace modified Newton’s formula assuming that propagation of sound in air is an adiabatic process and not an isothermal process. This is because the propagation of sound waves occurs over such short time scales, there isn’t sufficient time for heat exchange to take place between compressed layer of air…
Speed of Sound in Air Speed of Sound in Air :- The formula for velocity of sound in air was first obtained by Newton. He assumed that when sound propagates through a gas the temperature remains constant (i.e. the process is isothermal). So a compressed layer of air gradually loses heat to the surroundings…
Sound Intensity In Decibels | Sound Level In Decibels Sound Intensity In Decibels | Sound Level In Decibels :- Human ear respond to sound intensities from 10-12 Wm-2 to 1 Wm-2. Here the minimum frequency 10-12 Wm-2 is called threshold of hearing (I0) or reference intensity of human ear and upper range 1…
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Intensity of a wave | Power of a Wave Intensity of a wave | Power of a Wave :- The power of a wave refers to the rate at which energy is transferred by the wave per unit of time. In other words, it is the amount of energy carried by the wave over…
Energy of a Wave Energy of a Wave :- All waves carry energy. The energy of a wave refers to the amount of energy carried by the oscillations or disturbances propagating through a medium or space. It is the measure of the ability of the wave to do work or cause a change in…