devices are entering the commercialization stage. These technologies have distinct strengths weaknesses that will define their use and determine their market niches. The depth to which microwaves can penetrate tissues is primarily a function of the dielectric properties of the tissues and of the frequency of the micro waves. CHAPTER.2 HUMAN BODY The tissue of the human body is enormously varied and complex‚ with innumerable types of structures‚ components‚ and cells. These
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Metallic Cable Transmission Media Introduction Transmission media -It is included in the lowest layer of the OSI protocol hierarchy – the physical layer. -Transmission medium is simply the path between a transmitter and a receiver in a communications system. Guided Transmission media -some form of conductor that provide conduit in which signals are contained -the conductor directs the signal examples: copper wire‚ optical fiber Unguided Transmission media -wireless systems – without
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Date: 25th March‚ 2010 Title: Investigating the capacitance of a parallel-plate capacitor using a reed switch Objective: To investigate the factors which affect the capacitance of a parallel-plate capacitor using a reed switch. Apparatus: - reed switch - signal generator - capacitor plates of area about 0.24m X 0.24 m 1 pair - polythene spacers ( 10 X 10 X 1 mm ) - polythene sheet‚ same area as capacitor plate 1 mm thick - battery box with 4 cells
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ceramics according to chemical formula Ba1-xCaxTiO3 using solid state reaction method. The product will be characterized in terms of their crystalline structure (Powder X-Ray Diffraction)‚ microstructural behavior (Scanning electron microscopy)‚ Dielectric property (Permittivity analyzer) and crystal lattice vibration (Fourier-Transform Infrared Spectroscopy). In the X-Ray diffraction spectra‚ it is expected to observe the presence of a doublet peak from the reflection of (002) and (200)
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DESCRIBTION AND PRATICAL APPLICATION OF ELECTRICAL COMPONENTS NAME: AMAN VIKASH CHAND ID NO. : 2011001207 GROUP: TDEEN 1A TEACHER: MR. WILLIAM FONG YEAR: 2011 |RESISTORS | |Resistors(R) are a two-terminal passive electronic component which implements electrical resistance as a circuit element. They are
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K.R.Mangalam World School South City-I‚ Gurgaon Class-VIII Sub.-Chemistry (Chemical Effects of Electric Current) EXTRA QUESTIONS: Q. Why the bulb glows when the electric current passes through it? Ans. Due to the heating effect of current‚ the filament of the bulb gets heated to a high temperature and it starts glowing. Q. Write a short note on: (a) LED Ans. LED- Light Emitting Diodes are used for lighting. There are two wires(called leads) attached to a LED. One lead is longer than the other
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In ohmic heating processes‚ foods are made part of an electrical circuit through which alternating current (AC) flow causing heat to be generated within the food due to the electrical resistance of the foods. AC voltage is applied to the electrodes at both ends of the product such as both ends of vessel. The rate of heating is directly proportional to the square of the electric field strength and electrical conductivity. The most important factor that effectuates the rate of heating is electrical
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1. Introduction In order to reduce electric energy consumption‚ the use of CFLs‚ also known as energy saving lamps‚ is being strongly recommended. Utilities have also expressed concern since they have been actively recommending their use in their demand-side management (DSM) programs through giveaways and rebates. CFLs are non-linear consumers. Non-linear consumers produce harmonic currents which flow through the electric power network. They cancel out in generators and other consumers. The results
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The Effects of Microwave Apparatus on Food and Humans Hikaru Sugimori A microwave is a kitchen appliance that cooks food by dielectric heating. This is done by using radiation to heat water and other polarized molecules within the food. Using the microwave‚ people can buy pre-cooked foods at convenient stores and cook them in the microwave at home in a matter of minutes. Microwave ovens became widespread in the 1970s and 80s‚ and today‚ 90% of American households have a microwave. Microwaves
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Waves Assignment Microwave Ovens Microwave ovens‚ or microwaves‚ are kitchen appliances which use microwave radiation to cook‚ heat or defrost food. Properties of a microwave: Microwaves are electromagnetic waves with wavelengths longer than those of Terahertz (THz) wavelengths‚ but relatively short for radio waves. Microwaves have wavelengths approximately in the range of 30 cm (frequency = 1 GHz) to 1 mm (300 GHz). The word microwave generally refers to "alternating current signals with
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