Ajụjụ na Mkparịta ụka gbasara Ọwara Eletriki
Ọkụ eletrik bụ echiche dị mkpa na fiziki, ọ bụghị naanị na agụmakwụkwọ agụmakwụkwọ kamakwa na ndụ kwa ụbọchị, ụlọ ọrụ mmepụta ihe, na teknụzụ ọgbara ọhụrụ. Ịghọta ọkụ eletrik na-enye anyị ohere ịrụ ọrụ dị iche iche na ngwaọrụ eletrọniki, ịghọta sistemụ ike, na ọbụna ịrụ ma ọ bụ rụzie ngwa eletrọniki. Isiokwu a ga-akọwapụta ọtụtụ ihe atụ nke nsogbu na mkparịta ụka gbasara ọkụ eletrik iji nyere aka mee ka nghọta gị banyere isiokwu a sikwuo ike.
Nkọwa nke Ọwa Eletriki
Ọkụ eletrik bụ mmiri ọkụ eletrik na-eru site na onye na-eduzi ya, nke a na-ahụkarị n'ụdị elektrọn site na onye na-eduzi ya dịka waya ọla kọpa. A na-atụ ọkụ eletrik na amperes (A), nke bụ isi ihe dị na Sistemụ Mba Nile nke Units (SI).
Iwu Ohm
Otu n'ime ụkpụrụ ndị bụ isi e ji akọwa ọkụ eletrik bụ Iwu Ohm. Iwu a na-ekwu, sị, "Ọkụ eletrik nke na-agafe n'etiti isi ihe abụọ bụ kpọmkwem nha nhata na voltaji gafere isi ihe abụọ ahụ ma na-agbanwe agbanwe na nguzogide." Usoro mgbakọ na mwepụ maka Iwu Ohm bụ:
\[ I = \frac{V}{R} \]
Ebe:
– \( I \) bụ ọkụ eletrik dị na amperes (A),
– \(V \) bụ voltaji dị na volt (V),
– \( R \) bụ nguzogide dị na ohms (Ω).
Ajụjụ Ihe atụ nke 1: Ịgbakọ Ugbu a site na iji Iwu Ohm
Ajụjụ:
N'inye waya nwere nguzogide nke 10 ohms na voltaji nke 20 volts etinyere na nsọtụ waya ahụ, gbakọọ ugbu a na-agafe na waya ahụ.
Azịza:
Jiri usoro Iwu Ohm mee ihe:
\[ I = \frac{V}{R} \]
Ebe:
– \( V = 20 \ederede{ V} \),
– \( R = 10 \ederede{ Ω} \).
\[ I = \frac{20 \text{ V}}{10 \text{ Ω}} = 2 \text{ A} \]
Ya mere, ike nke ugbu a na-agafe na waya bụ 2 amperes.
Ajụjụ Ihe atụ nke 2: Ịgbakọ voltaji site na iji Iwu Ohm
Ajụjụ:
Batrị na-ebuga ọkụ eletrik nke amperes atọ site na resistor 15-ohm. Kedu voltaji batrị na-enye?
Azịza:
Jiri usoro Iwu Ohm nke agbanwere ka ọ bụrụ:
\[V = I \ugboro R \]
Ebe:
– \( I = 3 \ederede{ A} \),
– \( R = 15 \ederede{ Ω} \).
\[ V = 3 \ederede{ A} \oge 15 \ederede{ Ω} = 45 \ederede{ V} \]
Ya mere, voltaji nke batrị na-enye bụ 45 volts.
Ajụjụ Ihe atụ nke 3: Ịgbakọ Nguzogide Site na Iji Iwu Ohm
Ajụjụ:
Sekit nwere voltaji nke volt iri na abụọ na ugbu a nke amperes anọ. Gbakọọ uru iguzogide nke sekit ahụ.
Azịza:
Jiri usoro Iwu Ohm nke agbanwere ka ọ bụrụ:
\[ R = \frac{V}{I} \]
Ebe:
– \( V = 12 \ederede{ V} \),
– \( I = 4 \ederede{ A} \).
\[ R = \ frac{12 \ederede{V}}{4 \ederede{A}} = 3 \ederede{ Ω} \]
Ya mere, uru nguzogide dị na sekit ahụ bụ 3 ohms.
Ajụjụ Ihe Nlereanya nke 4: Usoro Sekọndrị
Ajụjụ:
A na-ejikọ resistors abụọ, nke ọ bụla nwere resistor nke 6 ohms na 4 ohms, n'usoro na isi iyi volt 20. Gbakọọ ugbu a na-agafe na sekit ahụ.
Azịza:
Maka ndị na-eguzogide ọgwụ n'usoro, ngụkọta nguzogide \( R_{\text{total}} \) bụ mkpokọta nke nguzogide nke ọ bụla:
\[ R_{\text{total}} = R_1 + R_2 = 6 \text{Ω} + 4 \text{Ω} = 10 \text{Ω} \]
Jiri usoro Iwu Ohm mee ihe:
\[ I = \frac{V}{R_{\text{total}}} \]
Ebe:
– \( V = 20 \ederede{ V} \),
– \( R_{\text{ngụkọta}} = 10 ederede {Ω} \).
\[ I = \frac{20 \text{ V}}{10 \text{ Ω}} = 2 \text{ A} \]
Ya mere, ike nke ugbu a na-agafe na sekit ahụ bụ 2 ampere.
Ajụjụ Ihe Nlereanya nke 5: Sekit Parallel
Ajụjụ:
A na-ejikọ resistors abụọ, nke ọ bụla nwere resistor nke 8 ohms na 4 ohms, n'otu aka ahụ na isi iyi volt 12. Gbakọọ mkpokọta ọkụ eletrik na-agafe na sekit ahụ.
Azịza:
Nke mbụ, gbakọọ nguzogide zuru oke \( R_{\text{total}} \) nke resistors ejikọtara na n'otu oge site na iji usoro:
\[ \frac{1}{R_{\text{total}}} = \frac{1}{R_1} + \frac{1}{R_2} \]
Ebe:
– \( R_1 = 8 \ederede{ Ω} \),
– \( R_2 = 4 \ederede{ Ω} \).
\[ \frac{1}{R_{\text{total}}} = \ frac{1}{8 \text{ Ω}} + \frac{1}{4 \text{ Ω}} = \frac{1}{8} + \frac{2}{8} = \frac{3}{8} \]
\[ R_{\text{total}} = \frac{8}{3} \ihe dị ka 2.67 \text{Ω} \]
Jiri usoro Iwu Ohm mee ihe:
\[ I = \frac{V}{R_{\text{total}}} \]
Ebe:
– \( V = 12 \ederede{ V} \),
– \( R_{\text{total}} \ihe dị ka 2.67 \text{Ω} \).
\[ I \ihe dịka \frac{12 \text{ V}}{2.67 \text{ Ω}} \ihe dịka 4.49 \text{ A} \]
Ya mere, mkpokọta ọkụ eletrik na-agafe na sekit ahụ bụ ihe dịka amperes 4.49.
Ajụjụ Ihe Nlereanya nke 6: Iji Iwu Kirchoff
Iwu Kirchoff
E nwere iwu Kirchoff abụọ a na-ejikarị eme ihe na nyocha sekit eletriki:
1. Iwu Kirchoff nke Ugbu a (KCL): Ọnụọgụ nke ugbu a na-abanye na isi ihe dị ka ọnụọgụ nke ugbu a na-ahapụ isi ihe ahụ.
2. Iwu Voltaji nke Kirchoff (KVL): Ngụkọta voltaji dị na loop mechiri emechi ga-aha nhata efu.
Ajụjụ:
E nyere sekit nwere alaka abụọ yiri ibe ha. Alaka nke mbụ nwere resistor 3-ohm ebe alaka nke abụọ nwere resistor 6-ohm, ha abụọ jikọtara na isi iyi volt 18. Gbakọọ ugbu a na-agafe alaka ọ bụla na mkpokọta ugbu a na sekit ahụ.
Azịza:
Jiri Iwu Ohm maka alaka ọ bụla:
Maka alaka mbụ:
\[ I_1 = \frac{V}{R_1} = \frac{18 \text{ V}}{3 \text{ Ω}} = 6 \text{ A} \]
Maka alaka nke abụọ:
\[ I_2 = \frac{V}{R_2} = \frac{18 \text{ V}}{6 \text{ Ω}} = 3 \text{ A} \]
Mkpokọta ọkụ eletrik bụ mkpokọta ọkụ eletrik sitere na alaka abụọ ahụ:
\[ I_{\text{total}} = I_1 + I_2 = 6 \text{ A} + 3 \text{ A} = 9 \text{ A} \]
Ya mere, ọkụ eletrik nke na-agafe n'alaka ọ bụla bụ amperes isii na amperes atọ, ọkụ eletrik niile nke na-asọfe na sekit ahụ bụ amperes itoolu.
Site n'iji ihe atụ na nkọwa ndị dị n'elu, anyị nwere olileanya na ị ga-enweta nghọta miri emi banyere ọkụ eletrik. Ịmụta echiche dịka Iwu Ohm, usoro na sekit parallel, na iwu Kirchoff bụ isi ihe dị mkpa iji dozie nsogbu dị iche iche metụtara ọkụ eletrik na fiziki.
