Problem solving on Gauss's law and verification of Divergence theorem

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In this video, total enclosed charge is calculated for given electric flux density and Divergence theorem is verified.







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Spotters in "Environment and Health: Mosquito control Measures" for CFM & MPH students

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The integrated approach of mosquito control: This is an approach that avoids the excessive use of any one method (e.g insecticides) but tries to combine one or more methods with a view to obtain maximum results with minimum inputs and also to prevent environmental pollution with toxic chemicals & development of insecticide resistance. The various methods of mosquito control are as follows: 1. Anti- Larval Measures: (a) Environmental Control: Important Points: Source reduction : Mainly the elimination of mosquito breeding places by minor engineering methods such as  Filling- of cesspools & open ditches and arrangement for adequate collection, removal, and disposal of sewage & wastewater. Leveling & getting rid of water-holding containers such as discarded tins, empty pots, broken bottles, coconut shells, etc. Drainage of breeding places, and  Water management (e.g intermittent irrigation) & removal of aquatic plants or destruction by herbicides. Rendering th...
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Spotters in "Environment and Health: Mosquitoes- Anopheles" for CFM & MPH students

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Anopheles Mosquito: Also known as the sophisticated mosquito. The flight range is 3-5 km. Around 45 species of anopheles mosquitoes have been found in India but only a few of them have been incriminated as vectors or carriers of malaria. These are An. fluviatilis & An. minimum (foot-hill regions), An. sundaicus & An. stephensi (coastal regions) and An culicifacies & An. philippinensis (planes). 1. Eggs: Important points: Eggs laid on the surface of the clean water. 100-250 at a time. This stage lasts for 1-2 days. Laid singly, boat-shaped & possess lateral floats. 2. Larva: Important points: The larva is a free-swimming creature. Passes through 4 stages called ' instars ' with moulting between each stage. Floats horizontally in water/ rests parallel to the water surface. No siphon tube at the tip of its abdomen.  Palmate hairs present on abdominal segments. 3. Pupa: Important points: The pupa is comma-shaped in appearance, with a large rounded cephalothorax and...
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Design equations of Rectangular Microstrip Patch Antenna

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Diabetes : Lets learn how to inject insulin

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Spotters in "Environment and Health: Fly control measurers " for CFM & MPH students

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1. Environmental control: Important points: The best way to control houseflies is to eliminate their breeding places & environmental sanitation. A clean house with clean surroundings is the best answer to the fly problem. Storing garbage, kitchen wastes, and other refuse in bins with tight lids, pending disposal. Efficient collection, removal & disposal of refuse by incineration, composting & sanitary landfill. Provision of Sanitary latrines, e.g, pit privies, septic tanks, water-seal latrines & sanitary system. Stopping open-air defecation. Sanitary disposal of animal excreta. Stepping up general sanitation.  2. Insecticidal control: Important points: Insecticides are only a supplement, but not a substitute for sanitation. (i) Residual sprays: It showed resistance to DDT in 1948 & also developed resistance to other organochlorines, organophosphorus, and carbamate pesticides. Susceptible flies may be killed by DDT (5%), methoxychlor (5%), lindane (0.5%), or chlo...
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Spotters in "Environment and Health: Insecticides" for CFM & MPH students

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