vidyut dhaara

aaveshon ke pravaah ki disha se dhaara ki disha nirdhaarit hoti hai.

vidyut aavesh ke gati ya pravaah mein hone par use vidyut dhaara (ilektrik karent) kehte hain. iski SI ikaai empeeyar hai. ek koolamb prati sekend ki dar se pravaahit vidyut aavesh ko ek empeeyar dhaara kaheinge.

kisi satah se jaate hue, jaise kisi taanbe ke chaalak ke khand se; vidyut dhaara ki maatra (empeeyar mein maapi gayi) ko paribhaashit kiya ja sakta hai :- vidyut aavesh ki maatra jo us satah se utane samay mein gujri ho . yadi yadi kisi chaalak ke kisi anuprasth kaat se Q koolamb ka aavesh t samay mein nikla; to ausat dhaara

${\displaystyle I={\frac {Q}{t}}}$

maapan ka samay t ko shoonya (rending to zero) banaakar, hamein tatkshan dhaara i(t) milti hai :

${\displaystyle i(t)={\frac {dQ}{dt}}}$

empeeyar, jo ki vidyut dhaara ki SI ikaai hai.

ikaai kshetrafal se pravaahit hone waali dhaara ki maatra ko dhaara ghanatv (kareint densiti) kehte hain. isse J se pradarshit karte hain.

yadi kisi chaalak se I dhaara pravaahit ho rahi hai aur dhaara ke pravaah ke lambavat us chaalak ka kshetrafal A ho to,

dhaara ghanatv

${\displaystyle J={\frac {I}{A}}}$

iski ikaai empeeyar / varg meter hoti hai.

yahaaain yeh maan liya gaya hai ki dhaara ghanatv, chaalak ke poore anuprasth kshetrafal par ek samaan hai. kintu adhikaansh sthitiyon mein aisa naheen hota hai. udaaharan ke liye jab hi chaalak se bahut adhik aavruti ki pratyaavarti dhaara (jaise 1 mega harts ki pratyaavarti dhaara) pravaahit hoti hai to uske baahari satak ke paas dhaara ghanatv adhik hota hai tatha jyon-jyon satah se bheetar kendra ki or jaate hain, dhaara ghanatv kam hota jaata hai. isi kaaran adhik aavruti ki dhaara ke liye mote chaalak banaane ke bajaay bahut hi kam motaai ke taar banaaye jaate hain. isse taar mein namyata (fleksibiliti) bhi aati hai.

== vidyut aaveshon ki bahaav gati == 30000

om ka niyam kehta hai, ek aadarsh pratirodhak mein pravaahit dhaara, vibhvaantar ke samaanupaati hoti hai. doosare shabdon mein,

${\displaystyle I={\frac {V}{R}}}$

jahaaain

I hai dhaara, empeeyar mein

V hai vibhvaantar, volt mein

R hai pratirodh, ohm mein

praakrutik udaaharan hain aakaasheeya vidyut ya taङait (Damini) evam saurya vaayu, jo ki srot hai uttareeya dhruvaprabha evam dakshineeya dhruvaprabha ka. iska maanav nirmit roop hai dhaatvak chaalakon mein aaveshit ilektraun ka pravaah, jaise shiropari vidyut prasaaran taar lambe doori hetu, evam chhote vidyut evam electronic upakaranon mein vidyut taar. baitari ke andar bhi ilaiktraun ka pravaah hota hai.

empeeyar ke niyam anusaar, vidyut pravaah chumbakeeya kshetr banaata hai.

vidyut pravaah chumbakeeya kshetr banaata hai.. chumbakeeya kshetr ko chaalak taar ko ghere hue, ghumaavadaar kshetreeya rekhaaon dvaara aabhaasit kiya ja sakta hai.

vidyut dhaara ko seedhe gailvainomeetar se maapa ja sakta hai. parantu is prakriya mein paripth ko toङaana paङaata hai. dhaara ko bina paripth ko toङae bhi, uske chumbakeeya kshetr ko maap kar, naapa ja sakta hai. ye upakaran hain, hall prabhaav sanvedak, karant klaimp, rogovski kundali.

== vidyut suraksha == vidhut se suraksha ke liye sabhi dhaaraavaahi bhaag ko inasulet kiya jaata hai ! vidhut paripth ke suraksha liye paripth me uchit maan ka fuse/mcb lagaaya jaata hai

Electronics praveshadvaar

• pratyaavarti dhaara
• dhaara ghanatv
• ekadisht dhaara
• vidyut chaalan
• SI ikaaiyaaain
• om ka niyam

• Which direction does electricity really flow?
• All about circuits - a useful site introducing electricity and electronics
• Electric current and Ohm's law
• Electric current and power