28 Matla a motlakase – mathata le ditharollo
1. Bala motlakase oa lebone la 10 Watt le etselitsoeng li-Volt tse 12.
Tse tsejoang:
Matla (P) = 10 Watt
Motlakase (V) = 220 Volt
Ho batloa: Motlakase oa motlakase
Tharollo:
Matla a lebone = 10 Watts = 10 Joules/motsotsoana
Tekanyo e ka tlase e bonts'a kamano pakeng tsa matla a motlakase (P), matla a motlakase (V) le motlakase oa motlakase (I) o boletsoeng foromong e ka tlase:
P = VI
Motlakase oa motlakase:
Ke = P / V = 10 / 220 = 1/22 = 0.045 Ampere
2. Bala matla a motlakase ho latela potoloho ea motlakase e ka tlase.
Tse tsejoang:
Mohanyetsi 1 (R 1 ) = 6 Ω
Mohanyetsi 2 (R 2 ) = 6 Ω
Motlakase oa motlakase (V) = 24 Volts
Ho batloa: Matla a motlakase
Tharollo:
Sehanyetsi se lekanang:
R1 le R2 li hokahane ka letoto. Resistor e lekanang :
R = R 1 + R 2 = 6 Ω + 6 Ω = 12 Ω
Motlakase oa motlakase:
Ke = V/R = 24/12 = 2 Ampere
Matla a motlakase:
P = VI = (24)(2) = 48 Watts = 48 Joule/motsotswana
3. Bala motlakase oa 3 kiloWatt o etselitsoeng li-Volt tse 150.
Tse tsejoang:
Matla a motlakase (P) = 3 kiloWatt = 3000 Watt
Motlakase oa motlakase (V) = 150 Volts
Ho batloa: Motlakase (I)
Tharollo:
Kamano ea matla a motlakase (P), matla a motlakase (V) le motlakase oa motlakase (I) e boletsoe foromong e ka tlase:
P = VI
Motlakase oa motlakase:
Ke = P / V
I = 3000 Watts / 150 Volts
I = 20 Ampere
4. Bala matla bakeng sa resistor ea \(10\,\Omega\) e nang le motlakase oa \(5\,A\).
Tharollo: \( P = I^2 R = 5^2 \makgetlo a 10 = 250\,W \)
5. Fumana matla a potoloho e nang le khanyetso ea \(12\,V\) le \(4\,\Omega\).
Tharollo: \( P = \frac{V^2}{R} = \frac{12^2}{4} = 36\,W \)
6. Tleloubu ya \(60\,W\) e sebetsa bakeng sa \(3\,h\). Bala matla a sebediswang.
Tharollo: \( E = Pt = 60 \makgetlo a 3 = 180\,Wh = 0.18\,kWh \)
7. Bala motlakase bakeng sa sesebediswa sa \(200\,W\) ka phepelo ya \(100\,V\).
Tharollo: \( I = \frac{P}{V} = \frac{200}{100} = 2\,A \)
8. Fumana khanyetso ea hitara e sebelisang \(1200\,W\) ho \(240\,V\).
Tharollo: \( R = \frac{V^2}{P} = \frac{240^2}{1200} = 48\,\Omega \)
9. Betri ea \(9\,V\) e hokahantsoe le resistor ea \(3\,\Omega\). Fumana matla a qhalaneng.
Tharollo: \( P = \frac{V^2}{R} = \frac{9^2}{3} = 27\,W \)
10. Bala matla ka resistor ea \(10\,\Omega\) e nang le phepelo ea \(100\,V\).
Tharollo: \( P = \frac{V^2}{R} = \frac{100^2}{10} = 1000\,W \)
11. Fumana motlakase o hlokahalang ho qhala \(50\,W\) ka har'a resistor ea \(10\,\Omega\).
Tharollo: \( V = \sqrt{PR} = \sqrt{50 \makgetlo a 10} = 22.36\,V \)
12. Motlakase o sebedisa \(1500\,W\) mme o sebetsa bakeng sa \(4\,h\). Fumana matla a sebediswang.
Tharollo: \( E = Pt = 1500 \makgetlo a 4 = 6000\,Wh = 6\,kWh \)
13. Fumana motlakase oa phepelo ea \(240\,V\) haeba motlakase o le \(1200\,W\).
Tharollo: \( I = \frac{P}{V} = \frac{1200}{240} = 5\,A \)
14. Bala khanyetso bakeng sa tleloubu ea \(100\,W\) e sebetsang ho \(200\,V\).
Tharollo: \( R = \frac{V^2}{P} = \frac{200^2}{100} = 400\,\Omega \)
15. Fumana matla a potolohong ea \(3\,A\) ka resistor ea \(15\,\Omega\).
Tharollo: \( P = I^2 R = 3^2 \makgetlo a 15 = 135\,W \)
16. Bala motlakase o hlokahalang ho qhala \(100\,W\) ka resistor ya \(20\,\Omega\).
Tharollo: \( V = \sqrt{PR} = \sqrt{100 \makgetlo a 20} = 44.72\,V \)
17. Fumana matla a sebelisoang ke fene ea \(300\,W\) e sebetsang bakeng sa \(2\,h\).
Tharollo: \( E = Pt = 300 \makgetlo a 2 = 600\,Wh = 0.6\,kWh \)
18. Bala hona joale ka potolohong ka matla a \(1000\,W\) le motlakase oa \(250\,V\).
Tharollo: \( I = \frac{P}{V} = \frac{1000}{250} = 4\,A \)
19. Fumana khanyetso ea toaster ea \(400\,W\) e sebetsang ho \(100\,V\).
Tharollo: \( R = \frac{V^2}{P} = \frac{100^2}{400} = 25\,\Omega \)
20. Fumana matla bakeng sa motlakase oa \(20\,V\) ho pholletsa le resistor ea \(5\,\Omega\).
Tharollo: \( P = \frac{V^2}{R} = \frac{20^2}{5} = 80\,W \)
21. Bala motlakase o hlokahalang ho fana ka resistor ea (25, Omega).
Tharollo: \( V = \sqrt{PR} = \sqrt{200 \makgetlo a 25} = 50\,V \)
22. Fumana matla a sebelisoang ke mochini oa \(500\,W\) o sebetsang bakeng sa \(5\,h\).
Tharollo: \( E = Pt = 500 \makgetlo a 5 = 2500\,Wh = 2.5\,kWh \)
23. Fumana motlakase bakeng sa tleloubu ea \(60\,W\) e sebetsang ho \(120\,V\).
Tharollo: \( I = \frac{P}{V} = \frac{60}{120} = 0.5\,A \)
24. Bala khanyetso bakeng sa lebone la \(40\,W\) le sebetsang ho \(20\,V\).
Tharollo: \( R = \frac{V^2}{P} = \frac{20^2}{40} = 10\,\Omega \)
25. Fumana matla a potolohong ea \(5\,A\) ka resistor ea \(12\,\Omega\).
Tharollo: \( P = I^2 R = 5^2 \makgetlo a 12 = 300\,W \)
26. Bala motlakase o hlokahalang ho isa \(150\,W\) ho resistor ya \(15\,\Omega\).
Tharollo: \( V = \sqrt{PR} = \sqrt{150 \makgetlo a 15} = 61.24\,V \)
27. Fumana matla a sebelisoang ke sehatsetsi sa moea sa \(800\,W\) se sebetsang bakeng sa \(3\,h\).
Tharollo: \( E = Pt = 800 \makgetlo a 3 = 2400\,Wh = 2.4\,kWh \)
28. Fumana hona joale potolohong e nang le matla a \(500\,W\) le motlakase oa \(125\,V\).
Tharollo: \( I = \frac{P}{V} = \frac{500}{125} = 4\,A \)
