Charge enclosed in incremental volume and Divergence theorem

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In this video, Gauss's law is applied to a general closed volume and a relation between volume and surface integration is found.






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Design equations of Rectangular Microstrip Patch Antenna

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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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Culex Mosquito: Also known as "nuisance mosquitoes". Culex fatigans is a vector of Bancroftian filariasis in India. It breeds profusely in dirty water collections e.g. stagnant drains, cesspools, septic tanks, burrow pits, & in fact all types of water collections. 1. Eggs: Important points: Lays eggs in small clusters or rafts.  Each raft contains 100-250 eggs. Eggs are oval-shaped. The eggs do not possess lateral floats. 2. Larva: Important points: Suspended in water with their heads downwards.  Possess a siphon tube, situated on the 8th abdominal segment.  Bottomfeeder. No palmate hairs. This stage lasts for 5-7 days. 3. Pupa: Important points: Comma shaped in appearance, with a large rounded cephalothorax & a narrow abdomen. The Siphon tube is long & narrow.  It represents the resting stage.  4. Adult:  Important points: A strong winged mosquito & can fly up to 11 km in rural areas.  Highly anthrophillic.  When at rest, the body...
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