Series Combination of Metallic Rods

Series Combination of Metallic Rods 1) Series Combination: Let n slabs each of cross sectional area, lengths  and conductivities  respectively be connected in the series. i) Heat Current: Heat current is the same in all the conductors. i.e., , ii) Equivalent thermal resistance: , iii) Equivalent thermal conductivity: It can be calculated as follows, from Read more about Series Combination of Metallic Rods[…]

Electrical Conducting Materials for Specific Use

Electrical Conducting Materials for Specific Use Electrical conducting materials are the basic requirement for electrical engineering products. 1) Filament of electric bulb: It is made up of tungsten which has high resistivity, high melting point. 2) Element of heating devices (such as heater, geyser or press): It is made up of nichrome which has high Read more about Electrical Conducting Materials for Specific Use[…]

Law of Radioactive Disintegration The spontaneous breaking of a nucleus is known as Radioactive Disintegration. According to Rutherford and Soddy made experimental study of the radioactive decay of various radioactive materials and gave the following the laws: Radioactive decay is a random and spontaneous process. It is not influenced by external conditions such as temperature, Read more about Law of Radioactive Disintegration[…]

Interference of Light

Interference of Light When two waves of exactly same frequency travels in a medium, in the same direction simultaneously then due to their superposition, at some points intensity of light is maximum while at some other point’s intensity is minimum. This phenomenon is called Interference of light. It is of following two types (1) Constructive Read more about Interference of Light[…]

Resistivity, Conductivity and Conductance

Resistivity, Conductivity and Conductance 1) Resistivity: Resistivity is a measure of the resistance of a given size of a specific material to electrical conduction. From, , if ,  then  i.e. resistivity is numerically equal to the resistance of a substance having unit area of cross section and unit length. i) Unit and dimension: Its SI Read more about Resistivity, Conductivity and Conductance[…]

Motion of Charge Particle in Electric Field

Motion of Charge Particle in Electric Field When charged particle initially at rest is placed in the uniform field: Suppose a charge particle having charge Q and mass M is initially at rest in an electric field of strength E. The particle will experience an electric force which causes its motion. (i) Force and Acceleration: Read more about Motion of Charge Particle in Electric Field[…]