How is the human body a good conductor of electricity?
The human body is generally not a good conductor. That said, there are circumstances which can and do conspire to make the human body occasionally “conductive enough” to appear otherwise.The skin is the least conductive part of the “human” circuit. The skin’s normal resistance is high enough to limit the current through the body (only) when the electrical signal is applied externally. The normal resistance is primarily due to dryness and the lack of both ions and a medium through which the current can flow. The resistance is reduced when the skin is wetted through sweat or other liquids.Note that the medical application of electricity to the skin typically involves large “sticky patches”, called skin electrodes, which have a moist sticky coating on the side of the patch applied to the skin. This coating improves electrical contact, reduces resistance, and increases current flow over the area of the skin the patch contacts. Larger electrodes (with more area of skin contact) permit proportionally greater current flow for the same applied voltage.
What are some ways to promote brain growth and memory?
eating fish oils and solving problems like Suduko or word games.
Why does a depletion region in a P-N junction decrease with doping?
Simplest way as my professor taught for easy understanding“When outsiders comes to live in a village then amount of agricultural field is automatically reduced for the native villagers.”Here dopants means outsiders, pn junction diode means a village, villagers means charge carriers and agricultural land is the depletion range.In technical termsA depletion region consists of immobile charge carriers such as positive ions and negative ions. The mobile charge carriers such as free electrons are absent in depletion region. The p-side of the depletion region has negative ions and n-side of the depletion region has positive ions.Now when doping is kept high in P-N junction, then there will be less space for electrons to travel.Here comes the magic. When electrons of N type crossed the junction then they get recombined with the holes of P type.After recombining the carriers achieved the equilibrium condition (i.e. n=p) and once equilibrium is achieved no change transfer takes place.In the similar way, holes moving from p-side to n-side meets the negative ions and makes them neutral atoms.Since all the recombination process takes place at the junction or nearby region so depletion width is decreased with doping. In this manner, free electrons and holes reduce the ions. Reduction of positive ions means reduction of depletion region. Thus, the depletion region decreases.Mathematically : Depletion width is nonlinearly and inversely proportional to the doping ;W ∝ 1/(√doping)I hope it helped you friends
Why is sodium kept in kerosene?
Because sodium is highly reactive metal. It react with water ,moisture and oxygen very fast. To from sodium oxide. This reaction is very fast and explosive. Sodium do not react with kerosene. Hence, to prevent from oxidation and injury sodium kept in kerosene.