Ihe atụ ise nke ajụjụ gbasara ike eletriki
1. A na-akpọ oriọna TL aha 10 W, 220 V. Nke a pụtara na oriọna ahụ chọrọ...
A. ike 10 J/sekọnd na ugbu a 0,045 A
B. ike 10 J/sekọnd na ugbu a 22 A
C. ike 10 J/min na ugbu a 0,045 A
D. ike 10 J/nkeji na ugbu a 22 A
Mkparịta ụka
A maara na:
Ike (P) = Watt 10
Voltaji (V) = Voltaji 220
A jụrụ: oriọna ahụ chọrọ…..
Azịza:
Ike oriọna = Watt 10 = Joules 10/sekọnd.
Nke a pụtara na oriọna a na-eri ike ruru iri n'ime otu sekọnd.
Usoro maka mmekọrịta dị n'etiti ike eletriki, voltaji eletriki na ọkụ eletrik:
P = VI
Nkọwa: P = ike eletriki , V = voltaji eletriki, I = ike eletriki
Ya mere, ọkụ eletrik bụ:
I = P / V = 10 / 220 = 1/22 = 0,045 Ampere
Azịza ziri ezi bụ A.
2. Lee foto a! Ike eletriki dị na sekit a bụ...
A. 2 watt
B. 24 watt
C. 48 watt
D. 72 watt
Mkparịta ụka
A maara na:
Resistor 1 (R 1 ) = 6 Ω
Resistor 2 (R2 ) = 6 Ω
Voltaji eletriki (V) = Voltaji iri na isii
A jụrụ: Ike eletriki
Azịza:
Ihe nnọchi anya:
A na-ejikọ R 1 na R 2 n'usoro. Ihe ndị na-eguzogide nnọchi bụ:
R = R 1 + R 2 = 6 Ω + 6 Ω = 12 Ω
Ike ọkụ eletrik:
I = V/R = 24/12 = 2 Ampere
Ike eletriki:
P = VI = (24)(2) = Watts 48 = Joules 48/sekọnd
3. A na-ebufe ike eletriki kilowatt atọ na voltaji nke voltaji 150. Oke nke ọkụ eletrik na-asọfe bụ...
A. 10 Amperes
B. 20 Amperes
C. 30 Amperes
D. 40 Amperes
Mkparịta ụka
A maara na:
Ike eletriki (P) = kilo 3 Watt = Watt 3000
Voltaji eletriki (V) = Voltaji iri na isii
Ajụjụ: Ike ọkụ eletrik (I)
Azịza:
Usoro nke na-egosi mmekọrịta dị n'etiti ike eletrik, voltaji eletriki na ọkụ eletrik:
P = VI
Gbakọọ ike eletrik site na iji usoro dị n'elu:
I = P/V
I = Watt 3000 / Volt 150
I = 20 Ampere
Azịza ziri ezi bụ B.
4. Ụlọ na-eji oriọna anọ nwere ike watt 20, oriọna abụọ nwere ike watt 60, na TV nke nwere ike watt 60. A na-agba ya nkezi awa asatọ kwa ụbọchị. Ọ bụrụ na ọkụ eletrik na-efu Rp 111,30 kwa kWh, ego ole ka ọ ga-eri maka otu ọnwa (ụbọchị iri atọ)?
Mkparịta ụka
A maara na:
Oriọna 4 nke Watt 20 = Watt 4 x 20 = Watt 80
Oriọna 2 nke Watt 60 = Watt 2 x 60 = Watt 120
TV 60 Watt = Watt 60
Oke ike ejiri:
Watt 80 + Watt 120 + Watt 60 = Watt 260
Oge etiti = awa 8 x 30 = awa 240
Ajụjụ: A ga-akwụ ụgwọ maka otu ọnwa (ụbọchị iri atọ)
Azịza:
Ike = Ike x Oge = Watt 260 x Awa 240 = Awa Watt 62400 = Kilogram 62,4 Watt awa = 62,4 kWh
Ọnụ = 62,4 kWh x Rp. 111,30 = Rp. 6945,12
5. E ji waya abụọ yiri ibe ha, dayameta ha bụ 1 mm na 2 mm, nke ọ bụla dị mita abụọ n'ogologo. Ọ bụrụ na waya abụọ ahụ ejikọta na otu isi iyi voltaji, mgbe ahụ oke dị n'etiti ike nke waya ndị dị na dayameta 1 mm na 2 mm na-emepụta bụ…
A. 1: 1
B. 1: 2
C. 1: 4
D. 2:1
E. 4: 1
Mkparịta ụka
Usoro maka iguzogide eletriki na nguzogide pụrụ iche:
Nkọwa: R = iguzogide, ρ = iguzogide kpọmkwem, l = ogologo onye nduzi, A = mpaghara elu nke onye nduzi
Usoro iwu Ohm:
V = IR
Nkọwa: V = voltaji eletriki, I = ọkụ eletrik, R = iguzogide ọkụ eletrik
Usoro ike eletriki:
P = VI
P = (IR) M
P = I 2 R
Dabere na usoro dị n'elu, ike eletriki (P) na-agbanwe agbanwe na dayameta waya (d):
Oke dị n'etiti ike nke waya dayameta nke 1 mm na 2 mm mepụtara bụ:
4: 1
Azịza ziri ezi bụ E.
Isi mmalite ajụjụ:
Ajụjụ Ule Sayensị Mba nke Ụlọ Akwụkwọ Sekọndrị/Islamic Junior High School Sayensị
Ajụjụ gbasara Fizik SBMPTN
