Electromagnetic Induction

The development of electric current with the help of magnetic field is known as electromagnetic induction.

Motional EMF

It is the EMF or potential difference develop across the ends of wire, when it is in motion in a given magnetic field.

Rotational EMF

It is the potential difference or EMF induced across the ends of a rotating rod in a given magnetic field.

Self-Induction

It is the phenomena of induction of EMF are electric current in a loop due to change in its own current or magnetic field.

Mutual Induction

It is the phenomena of induction of EMF in a loop or coil due to change in magnetic field of second coil when they are kept co-axillary closed to each other.

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Surface Chemistry – Introduction

Surface Chemistry:- is the branch of chemistry which deals with the study of the phenomena occurring at the surface or interface, at boundary separating two bulk phases. The results about surface studies can be obtained only by taking the clean surfaces. Definitions of certain terms:- Adsorption:- The phenomenon of attracting and retaining of the molecules of a substance on the surface of a liquid or solid into a higher concen ration of molecule on surface is called adsorption. The substance which is adsorbed on the surface is called adsorbate and the substance on which it is adsorbed is called adsorbent. Desorption:- The reverse process; removal of the adsorbed substances from the surface is called. Desorption (it can be done by heating or reducing pressure) Examples of adsorption in its Favor:- To the solution of an organic dye such as methylene blue, add animal charcoal and stir it is observed that the intensity of the colour in the solution decreases showing some amount...

Surface Chemistry – Difference between Adsorption and Absorption

Difference between adsorption and absorption:- Sorption:- If the adsorption and absorption takes place simultaneously then the process is named as sorption. Negative adsorption:- When the concentration of the adsorbate is more on the surface of adsorbent then in the bulk, it is called adsorption if the concentration of adsorbate increases in the bulk after adsorption it is called negative adsorption. Factors affecting the adsorption of gases by solids:- Nature and surface area of adsorbent:- at the same temperature greater is the surface area of adsorbent greater is theadsorption. Example charcol, silica are good adsorbent due their pourous structure and area. Nature of gas:- it is given that higher the critical temperature of the gas greater is its adsorption or more easily a gas is liquefiable or more soluble in water more is its adsorption. Tempreture:- adsorpation of any particular gas by some particular adsorbent is decreases with the increase in ...

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