Category: Pure Sciences

Satellite Communication

Science > Physics > Communication > Satellite Communication Radio Communication uses ground wave, skywave, and space wave propagation. Ground wave and space wave communication are restricted to small distances, whereas skywave propagation uses frequencies ranging from 3 MHz to 30 MHz. Very high frequency (> 30 MHz) and microwave communication over long distances use a Satellite. […]

Physics

Coverage Area of Antenna

Science > Physics > Communication > Coverage Area of Antenna An antenna or aerial is a system of elevated conductors which couples the transmitter or receiver to the communication channel. Thus it is required at both ends i.e. transmitter end and receiver end. The same antenna can be used for transmitting and receiving functions. Expression […]

Tags Amplifier, Antenna, Attenuation, Broadcast communication, Communication, Communication channels, Communication systems, Coverage area, Demodulator, Distortion, Interference, Modulation, Modulator, Noise, Point to point communication, Receiver, Transmission area, Transmitter

Human Biology

Buccal Cavity: Teeth

Science > Biology > Digestion and absorption in Human > Buccal cavity – Teeth In this article we shall study, the characteristics of teeth (dentition), different types of teeth and the structure of the tooth. The teeth are the strongest, hardest and rigid substances in the human body specialized for the biting and grinding of […]

Physics

Communication Channel: Atmosphere

Post author By Hemant More
Post date November 15, 2019
1 Comment on Communication Channel: Atmosphere

Science > Physics > Communication > Communication Channel: Atmosphere A communication channel is a link connecting a transmitter and a receiver. It is the physical medium which carries the signal from the transmitter to the receiver ideally without any noise or distortion. The atmosphere, optical fibres, parallel wires, coaxial cables, etc. are used as communication […]

Physics

Terminology of Communication System

Post author By Hemant More
Post date November 15, 2019
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Science > Physics > Communication > Terminology of Communication System In this article, we are going to study the terms used in the communication system and the concept of the bandwidth of a signal. Transducer: Any device that converts one form of energy into another can be termed as a transducer. Example: A microphone is […]

Physics

Communication System

Science > Physics > Communication > Communication System Communication is the process of exchange of information between two entities. It involves sending, receiving and processing information. Thus there is a transmission of information from a source at one place to a receiver located at another place. The communication system is a device or setup used […]

Physics

Magnetic Induction at a Point on the Axis and the Equator

Post author By Hemant More
Post date November 15, 2019
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Science > Physics > Magnetism > Magnetic Induction at a Point on the Axis and the Equator In this article, we shall study magnetic induction at the point on the magnetic axis and magnetic equator of bar magnet. Magnetic Induction at a Point on Axis of Bar Magnet: The line passing through the poles of […]

Tags Magnetic axis, Magnetic equator, Magnetic induction, Magnetism

Physics

Shear Stress, Shear Strain, and Modulus of Rigidity

Post author By Hemant More
Post date November 14, 2019
1 Comment on Shear Stress, Shear Strain, and Modulus of Rigidity

Science > Physics > Elasticity > Shear Stress, Shear Strain, and Modulus of Rigidity In this article, we shall study the concept of shear stress, shear strain, and modulus of rigidity. Shear Stress: When the deforming forces are such that there is a change in the shape of the body, then the stress produced is […]

Tags Area under shear, Deformation, deforming force, Elastic material, Elasticity, Hooke's law, Modulus of elasticity, Plastic material, Plasticity, Rigid material, Rigidity, Shear strain, Shear stress, Shearing force, Strain, Stress

Physics

Behaviour of Ductile Material With Increasing Load

Post author By Hemant More
Post date November 14, 2019
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Science > Physics > Elasticity > Behaviour of Ductile Material With Increasing Load In this article, we shall study the construction and use of Searle’s apparatus to find Young’s modulus of wire and behaviour of ductile material of wire under increasing load. Searle’s Experiment: Apparatus : Two identical wires A and B are suspended from […]

Physics

Stresses and Strains in Compound Wires

Post author By Hemant More
Post date November 14, 2019
1 Comment on Stresses and Strains in Compound Wires

Science > Physics > Elasticity > Stresses and Strains in Compound Wires Problem – 1: For two wires of the same material, both the radii and lengths are in the ratio 1:2. What should be the ratio of stretching forces on the wires if equal extensions are to be produced in the two? Given: Ratio of […]

Tags Deformation, deforming force, Elastic material, Elasticity, Extension in wire, Hooke's law, Longitudinal strain, Longitudinal stress, Modulus of elasticity, Plastic material, Plasticity, Ratio of elongations, Ratio of extensions, Ratio of loads, Rigid material, Rigidity, Strain, Stress, Young's modulus of elasticity