Babban Filament na Bulb: Zan Iya Ka Bincike
Zaɓu na ɗaya ce mai kawo-karfi da yake lalace da yawa a lokacin da electric current ya zama a cikinsu. Yana daya daga cikin abubuwa masu muhimmanci a cikin zaɓu na ƙarami, wanda ke samun rai da yake lalace da yawa zuwa tsakiyar tsohuwa. Zaɓu na ƙarami idan yana da ma'ana da kuma yawan ra'ayi da yake lalace da yawa zuwa tsakiyar tsohuwa. A nan, zan iya bincike tarihin, alamar, da kuma fannin abubuwan da ake amfani da su don zaɓu na ƙarami, kuma mafi kyau da mafi ƙananan zaɓu na ƙarami.
Meen Zabu na Karami?
Zaɓu na ƙarami na nufin rai da yake lalace da yawa a lokacin da an zama zuwa tsakiyar tsohuwa. Zaɓu na ƙarami yana kasance a cikin gida mai karami da ke da karamin ko gas mai karfi wanda ke hana hankali da zaɓu na ƙarami. Gida na ƙarami tana haɗa da kayan aiki da waɗanda suka haɗa su a cikin gida.
Tarihin zaɓu na ƙarami ta samu bayanin da yawa a shekarun 18th da 19th, amma zaɓu na ƙarami na biyu da aka yi a lokacin da aka yi a kan yakin Thomas Edison a shekarar 1879. An yi amfani da zaɓu na ƙarami mai karamin bamboo, wanda ta samu lokaci na 1200. Ba ɗaya, an yi amfani da zaɓu na ƙarami mai karamin cotton thread, wanda ta samu lokaci na 1500.
Ma Alamar Abubuwan da Zaɓu na Ƙarami?
Abubuwan da zaɓu na ƙarami ke da su yana da alamomin da yake lalace da yawa zuwa tsakiyar tsohuwa:
Tsakiyar tsohuwa mai yawa: Zaɓu na ƙarami yana da kyau a yin tsakiyar tsohuwa mai yawa kafin ba ya zama zuwa tsakiyar tsohuwa.
Tsakar ruwa mai yawa: Zaɓu na ƙarami ba zai sauya ko zama zuwa tsakiyar tsohuwa, wanda zai hana hankali da gida.
Babu ƙarfin tsakiyar tsohuwa: Zaɓu na ƙarami ba zai ci gaba da oxygen ko wasu gas da ke cikin gida.
Mai tsakar electric resistance: Zaɓu na ƙarami yana da tsakar electric resistance, wanda yake lalace da yawa zuwa tsakiyar tsohuwa.
Mai tsakar tsakiyar tsohuwa: Zaɓu na ƙarami ba zai ci gaba da tsakiyar tsohuwa.
Mai tsakar tsakiyar tsohuwa: Zaɓu na ƙarami ba zai ci gaba da tsakiyar tsohuwa.
Mai tsakar tsakiyar tsohuwa: Zaɓu na ƙarami ba zai ci gaba da tsakiyar tsohuwa.
Mai tsakar tsakiyar tsohuwa: Zaɓu na ƙarami ba zai ci gaba da tsakiyar tsohuwa.
Mai tsakar tsakiyar tsohuwa: Zaɓu na ƙarami ba zai ci gaba da tsakiyar tsohuwa.
Mai tsakar tsakiyar tsohuwa: Zaɓu na ƙarami ba zai ci gaba da tsakiyar tsohuwa.
Meen Abubuwan da ake Amfani da Su don Zaɓu na Ƙarami?
Ake amfani da wasu abubuwan da ake amfani da su don zaɓu na ƙarami a ranar. Wasu daga cikinsu suna cikin:
Karbon
Karbon ce babban abubuwan da ake amfani da su don zaɓu na ƙarami a lokacin da Edison da wasu mafi girman. Karbon yana da tsakiyar tsohuwa (3500°C), tsakar ruwa mai yawa, tsakar electric resistance (1000-7000 µΩ-cm), da kuma tsakar tsakiyar tsohuwa (-0.0002 to -0.0008 /°C). Amma, karbon tana da tsakar tsakiyar tsohuwa, tsakar tsakiyar tsohuwa, tsakar electric resistance, da kuma tsakar tsakiyar tsohuwa. Zaɓu na ƙarami mai karbon tana da tsakar electric resistance (4.5 lumens per watt) da tsakiyar tsohuwa (1800°C).
Karbon tana da amfani a kan pressure-sensitive resistors, wadanda ake amfani da su a automatic voltage regulators, da kuma carbon brushes, wadanda ake amfani da su a DC machines.
Tantalum
Tantalum tana amfani da Werner von Bolton a shekarar 1902. Tantalum yana da tsakiyar tsohuwa (2900°C), tsakar ruwa mai yawa, tsakar electric resistance (12.4 µΩ-cm), da kuma tsakar tsakiyar tsohuwa (6.5 /K). Amma, tantalum tana da tsakar tsakiyar tsohuwa, tsakar tsakiyar tsohuwa, tsakar electric resistance (0.0036 /°C), tsakar tsakiyar tsohuwa, da kuma tsakar electric resistance (3.6 W/candle power). Zaɓu na ƙarami mai tantalum tana da tsakiyar tsohuwa (2000°C).
Tantalum ba a yi amfani da shi a kan zaɓu na ƙarami saboda tsakar electric resistance da kuma tsakar tsakiyar tsohuwa.
Tungsten
Tungsten ce abubuwan da ake amfani da su don zaɓu na ƙarami a yanzu. An yi amfani da shi a lokacin da William D. Coolidge a shekarar 1910. Tungsten yana da tsakiyar tsohuwa (3410°C), tsakar ruwa mai yawa, tsakar electric resistance (5.65 µΩ-cm), tsakar tsakiyar tsohuwa, tsakar tsakiyar tsohuwa, da kuma tsakar tsakiyar tsohuwa. Amma, tungsten tana da tsakar tsakiyar tsohuwa (0.005 /°C) da kuma tsakar tsakiyar tsohuwa (4.3 /K). Zaɓu na ƙarami mai tungsten tana da tsakar electric resistance (12 lm/W) da tsakiyar tsohuwa (2500°C).
Tungsten tana da amfani a kan X-ray tubes da kuma electrical contact material a wasu abubuwa.
Meen Hanyoyin Da Ake Yi Zaɓu na Ƙarami?
Ake yi zaɓu na ƙarami da wasu hanyoyi da ake amfani da su. Wasu daga cikinsu suna cikin:
Karbon
Ake yi zaɓu na ƙarami mai karbon da yanayin karbonize organic materials kamar bamboo, cotton thread, paper pulp, etc., a cikin atmosphere mai karfi a tsakiyar tsohuwa (1000-1500°C). Karbonized material tana da ita a cikin thin wires da kuma wind into coils.
Tantalum
Ake yi zaɓu na ƙarami mai tantalum da powder metallurgy techniques. Tantalum powder tana halarta da binder da kuma press into rods or wires. Rods or wires tana sinter at high temperatures (2000-2500°C) in a vacuum or inert gas atmosphere. Sintered rods or wires tana draw into thin wires and wind into coils.
Tungsten
