Nā Haʻawina Hoʻonaʻauao Kino Kumu

ʻAtikala e pili ana i ka Resistivity

E pili ana i ke au uila, ua kūkākūkā ʻia ka nui o ke au uila, no laila ua wehewehe ʻia ke kahua uila ma ke kumuhana e pili ana i ke kahua uila. Aia ke kahua uila a me ke au uila i loko o kahi alakaʻi inā he ʻokoʻa hiki i ke alakaʻi, ʻoiai inā ʻaʻohe ʻokoʻa hiki, a laila ʻaʻohe kahua uila a me ke au uila.

Ma aneane nā alakaʻi metala āpau, ua kūlike pololei ke kahua uila me ka nui o ke au uila, kahi e mau ai ka lakio o ke kahua uila i ka nui o ke au uila. ʻO ka waiwai o ka hoʻohālikelike ʻana o ke kahua uila i ka nui o ke au ua kapa ʻia ʻo resistivity. Ma ke ʻano makemakika, ua ʻōlelo ʻia ka pilina ma waena o ke kahua uila, ka nui o ke au, a me ka resistivity ma ka hoohalike:

heluhelu hou

Article about the Resistor color code

ka pale pale is one component of an electrical circuit that functions to control the number of electric currents. In general, there are two types of resistors, namely wire coil resistors and carbon resistors. Wire roll resistors are usually used in the laboratory, made by wrapping fine wire on the surface of the insulator tube. Carbon resistors are typically used in electronic circuits, cylindrical, and have wires at both ends. The value of the carbon resistor resistance is expressed in color code and displayed on the surface of the resistor.

The resistance value of a resistor can be known by interpreting the resistor color code. To understand this, first look at the following table, then study the example problem to determine the resistor resistance value.

heluhelu hou

ʻAtikala e pili ana i nā Resistors ma ke ʻano moʻo

Inā pili nā resistors e like me ka mea i hōʻike ʻia ma ke kiʻi, ua hoʻonohonoho ʻia nā resistors ma ke ʻano moʻo. Hiki i ke resistor a i ʻole ke kū'ē uila i nīnau ʻia ke ʻano o nā ʻāpana resistor, nā kukui, a i ʻole nā ​​​​kū'ē uila ʻē aʻe.

Ke neʻe nei ka uku uila ma o ke kū'ē 1 (R₁) = ka uku uila neʻe ma o ke kū'ē 2 (R₂) = neʻe ka uku uila ma o ke kū'ē 3 (R₃). Au uila ʻO (I) kahi uku uila e kahe ana i loko o kekahi manawa (I = Q / t), no laila ke au uila ma o ke kū'ē 1 (I₁) = ke au uila ma o ke kū'ē 2 (I₂) = ke au uila ma o ke kū'ē 3 (I₃). Ma ke ʻano makemakika, ʻo ka huina o ke au uila (I) = I₁ =I₂ =I₃.

heluhelu hou

Ka hoʻohālikelike o ke kū'ē uila

Ma ke kumuhana o ke kānāwai o Ohm, he ʻano hana e hōʻike ana i ka pilina ma waena o anakahi uila (V), uila uila (ʻO wau), a me pale uila Ua loaʻa mai (R). Hōʻike ʻia ma ka makemakika ma o nā kaulike:

Hōʻike kēia kaulike ua kūlike pololei ke kū'ē uila (R) me ke ana uila (V) a kūlike hoʻi me ke au uila (I). Inā ʻoi aku ka nui o ke ana uila ma mua o ke kū'ē uila, e nui ana ka nui, ma ke ʻano ʻē, inā ʻoi aku ka ikaika o ke au uila, e nui ana ke kū'ē uila. Wehewehe kēia kaulike i ke kānāwai o Ohm ke paʻa mau ke kū'ē uila (R). Inā ʻaʻole paʻa ke kū'ē uila, a laila ʻaʻole wehewehe kēia kaulike i ke kānāwai o Ohm, akā, wehewehe i ke kū'ē o kahi alakaʻi.

heluhelu hou

ʻAtikala e pili ana i nā Resistors ma ke ʻano like

Inā ua hoʻopili ʻia nā resistors e like me ke kiʻi, ua hoʻopili ʻia nā resistors ma ke ʻano like.

ka uila uila (au uila = ka uku uila e kahe ana i loko o kahi manawa pōkole) e komo ana i ke kiko hui like me ke au uila e puka ana mai ke kiko hui. Aia kekahi mau hui ʻana i hiki ai i ka huina o ke au uila = ka nui o ke au uila e kahe ana i kēlā me kēia hui. Ma ke ʻano makemakika, I = I₁ + ʻO wau₂ + ʻO wau₃ʻOiai ka ʻokoʻa hiki ke uila a i ʻole uila uila ma kēlā me kēia huina ua like ia.

I = V/R no laila ua loli ke kaulike ma luna nei i I = V/R₁ + V/R₂ + V/R₃Ua like ke ana uila, no laila e loli kēia kaulike i I = V (1/R₁ +1/R₂ +1/R₃). Inā ʻo ke kū'ē like he 1/R a laila ʻo I = V (1/R). No laila, 1/R = 1/R₁ +1/R₂ +1/R₃.

heluhelu hou

ʻAtikala e pili ana i ke kumu o ka ikaika electromotive emf Ke kū'ē kūloko Ka uila terminal

Au uila kahe ana i loko o kahi kaapuni pani, mai ka hiki ke kiʻekiʻe a i ka hiki ke haʻahaʻa. Ke neʻe kahi au uila ma o kahi ʻāpana o ke kū'ē uila, aia ka emi ʻana o ikehu hiki ke uila no ka mea, hoʻohana ʻia ka ikehu uila ma kēia kū'ē. I mea e hoʻomau ai ke kahe ʻana o ke au uila mai ka hiki ke kiʻekiʻe a i ka hiki ke haʻahaʻa,

pono e loaʻa kahi mea hana e hoʻohui i ka ikehu uila, ʻo ka mea hana he electromotive force (emf) a i ʻole i kapa ʻia he kumu uila uila. ʻO Emf a i ʻole ke kumu uila he ʻāpana e hoʻololi i kahi ʻano ikehu i ikehu uila, e like me nā pila, nā cell solar, a i ʻole nā ​​​​mea hana uila.

heluhelu hou

Nā EMF ma ke ʻano moʻo a me ke ʻano like

Inā ʻelua a ʻoi aku paha nā kumu o ka electromotive (emf) i hoʻopili ʻia e like me ka mea i hōʻike ʻia ma ke kiʻi, ua hoʻonohonoho ʻia ka emf ma ke ʻano he moʻo.

ʻO ka mea like anakahi uila ʻo ke kumu (ε):

ε = ε₁ + ε₂ + ε_n

ʻO ke kū'ē kūloko like (r) penei:

r = r₁ +r₂ +r_n

ʻO ke au uila e kahe ana ma o ke kū'ē kūwaho (R):

heluhelu hou

ʻO ke kānāwai mua a Kirchhoff i kapa ʻia hoʻi ʻo ke kānāwai o ke kiko hui e ʻōlelo ana ʻo ke au uila e komo ana i kahi kiko hui e like me ke au uila e puka ana mai kēlā kiko hui. ʻO ke kiko hui i loko o kahi kaapuni uila kahi e hui ai ʻelua a ʻoi aku paha o nā alakaʻi ʻelua, e like me ke kiko a ma ke kiʻi ma ka ʻaoʻao.

ʻO I ke au uila e komo ana i ke kiko hui, ʻoiai ʻo I₁ aʻo wau₂ ʻo ia nā au uila e puka ana mai ke kiko hui, I = I₁ + ʻO wau₂ʻO kekahi laʻana, e nānā i ke kiʻi ma lalo.

heluhelu hou

ʻŌlelo ka lua o ke kānāwai a Kirchhoff ʻo ka loli o ka hiki ke uila ma ke anapuni o kahi kaapuni pani ʻia he ʻole. Hoʻokumu ʻia ka lua o ke kānāwai a Kirchhoff ma ke kānāwai o ka mālama ʻana i ka ikehu, kahi e ʻōlelo ai he mau loa ka ikehu.

I mea e hoʻomaopopo maikaʻi ai i kēia, e noʻonoʻo i ka neʻe ʻana o ka uila i loko o kahi kaapuni pani, e like me ke kiʻi. Ke hele kahi uila ma o kahi pale uila (R), ke ikehu hiki ke uila ua hoʻemi ʻia no ka mea ua hoʻohana ʻia ma kēia mau kū'ē. Inā hele ka uku uila ma o kekahi kū'ē uila ʻē aʻe, e emi hou ana ka ikehu hiki ke uila no ka mea ua hoʻohana hou ʻia ma ke kū'ē. Eia kekahi, ke hele ka uku uila ma o ke kumu uila mai kahi hiki haʻahaʻa a i kahi hiki kiʻekiʻe, e piʻi aʻe ka ikehu hiki ke uila. Ke hoʻi ia i kona wahi mua, ua like ka ikehu hiki ke uila me ma mua, kahi i ʻole ai ka loli o ka ikehu hiki ke uila. Ke hoʻopili ʻia ʻO KirchhoffʻO ka lua o ka lula i kahi kaapuni uila, hoʻohana mākou i ka loli o ke voltage uila, ʻaʻole ka loli o ka ikehu hiki ke uila.

heluhelu hou

Ka wehewehe ʻana o ka mana uila

ʻO ka mana i aʻo ʻia ma ka hana a me ka ikehu ua hoʻoholo ʻia ʻo ia ka hana i hana ʻia i loko o kahi manawa kikoʻī. ʻO ka hana kahi hana o ka hoʻololi ikehu i hiki ke hoʻomaopopo ʻia ka mana he loli i ka ikehu e hana ʻia i loko o kahi manawa kikoʻī.

ʻO ka mana uila kahi loli o ka ikehu uila i loko o kahi manawa kikoʻī. Ma kahi loiloi o ka hiki ke uila, ua wehewehe ʻia e hana ʻia nā loli o ka ikehu hiki ke uila ke hele kahi uku uila ma kahi wahi hiki ke uila ʻokoʻa.

heluhelu hou