28 Amandla kagesi - izinkinga nezixazululo
1. Bala ugesi wesibani esingu-10 Watt esenzelwe ama-volt angu-12.
Kwaziwa:
Amandla (P) = 10 Watt
I-Voltage (V) = 220 Volt
Okufunwayo: Amandla kagesi
Isixazululo:
Amandla esibani = 10 Watts = 10 Joules/isekhondi
Isibalo esingezansi sibonisa ubudlelwano phakathi kwamandla kagesi (P), amandla kagesi (V) kanye nogesi wamanje (I) okushiwo kufomula engezansi:
P = VI
Amandla kagesi:
I = P / V = 10 / 220 = 1/22 = 0.045 Ampere
2. Bala amandla kagesi ngokwesekethe kagesi engezansi.
Kwaziwa:
Isithambisi 1 (R1 ) = 6 Ω
Isithambisi 2 (R2 ) = 6 Ω
I-voltage kagesi (V) = 24 Volts
Kufunwa: Amandla kagesi
Isixazululo:
Isivikelo esilinganayo:
I-R1 kanye ne- R2 zixhunywe ngochungechunge. I-resistor efanayo:
R = R 1 + R 2 = 6 Ω + 6 Ω = 12 Ω
Ugesi wamanje:
I = V/R = 24/12 = 2 Ampere
Amandla kagesi:
P = VI = (24)(2) = 48 Watts = 48 Joules/second
3. Bala ugesi ongu-3 kiloWatt owenzelwe ama-volts angu-150.
Kwaziwa:
Amandla kagesi (P) = 3 kiloWatt = 3000 Watt
I-voltage kagesi (V) = 150 Volts
Okufunwayo: Ugesi wamandla (I)
Isixazululo:
Ubudlelwano bamandla kagesi (P), amandla kagesi (V) kanye nogesi wamanje (I) buchazwe kule fomula engezansi:
P = VI
Ugesi wamanje:
I = P/V
I = 3000 Watts / 150 Volts
I = 20 Ampere
4. Bala amandla e-resistor ye-\(10\,\Omega\) ene-current ye-\(5\,A\).
Isixazululo: \( P = I^2 R = 5^2 \izikhathi 10 = 250\,W \)
5. Thola amandla wesekethe enokumelana kwe-\(12\,V\) kanye ne-\(4\,\Omega\).
Isixazululo: \( P = \frac{V^2}{R} = \frac{12^2}{4} = 36\,W \)
6. Ibhalbhu ye-\(60\,W\) isebenza ku-\(3\,h\). Bala amandla asetshenzisiwe.
Isixazululo: \( E = Pt = 60 \izikhathi 3 = 180\,Wh = 0.18\,kWh \)
7. Bala ugesi wedivayisi engu-(200\,W\) ku-(100\,V\) supply.
Isixazululo: \( I = \frac{P}{V} = \frac{200}{100} = 2\,A \)
8. Thola ukumelana kwesifudumezi esisebenzisa i-\(1200\,W\) ku-\(240\,V\).
Isixazululo: \( R = \frac{V^2}{P} = \frac{240^2}{1200} = 48\,\Omega \)
9. Ibhethri le-\(9\,V\) lixhunywe ku-resistor ye-\(3\,\Omega\). Thola amandla ahlakazekile.
Isixazululo: \( P = \frac{V^2}{R} = \frac{9^2}{3} = 27\,W \)
10. Bala amandla ku-resistor ye-\(10\,\Omega\) ene-\(100\,V\) supply.
Isixazululo: \( P = \frac{V^2}{R} = \frac{100^2}{10} = 1000\,W \)
11. Thola i-voltage edingekayo ukuze kukhishwe i-\(50\,W\) ku-resistor ye-\(10\,\Omega\).
Isixazululo: \( V = \sqrt{PR} = \sqrt{50 \times 10} = 22.36\,V \)
12. Injini isebenzisa i-\(1500\,W\) futhi isebenza i-\(4\,h\). Thola amandla asetshenzisiwe.
Isixazululo: \( E = Pt = 1500 \izikhathi 4 = 6000\,Wh = 6\,kWh \)
13. Thola amandla kagesi okunikezwayo kwe-\(240\,V\) uma amandla engu-\(1200\,W\).
Isixazululo: \( I = \frac{P}{V} = \frac{1200}{240} = 5\,A \)
14. Bala ukumelana kwebhalbhu ye-\(100\,W\) esebenza ku-\(200\,V\).
Isixazululo: \( R = \frac{V^2}{P} = \frac{200^2}{100} = 400\,\Omega \)
15. Nquma amandla kusekethe ye-\(3\,A\) nge-resistor ye-\(15\,\Omega\).
Isixazululo: \( P = I^2 R = 3^2 \izikhathi 15 = 135\,W \)
16. Bala i-voltage edingekayo ukuze kukhishwe i-\(100\,W\) ku-resistor ye-\(20\,\Omega\).
Isixazululo: \( V = \sqrt{PR} = \sqrt{100 \times 20} = 44.72\,V \)
17. Thola amandla asetshenziswa yifeni engu-\(300\,W\) esebenza ngo-\(2\,h\).
Isixazululo: \( E = Pt = 300 \izikhathi 2 = 600\,Wh = 0.6\,kWh \)
18. Bala ugesi kusekethe ngamandla angu-\(1000\,W\) kanye ne-voltage engu-\(250\,V\).
Isixazululo: \( I = \frac{P}{V} = \frac{1000}{250} = 4\,A \)
19. Thola ukumelana kwe-toaster engu-(400\,W\) esebenza ku-(100\,V\).
Isixazululo: \( R = \frac{V^2}{P} = \frac{100^2}{400} = 25\,\Omega \)
20. Thola amandla e-voltage engu-\(20\,V\) ku-resistor engu-\(5\,\Omega\).
Isixazululo: \( P = \frac{V^2}{R} = \frac{20^2}{5} = 80\,W \)
21. Bala i-voltage edingekayo ukuze unikeze i-resistor ye-(25,\Omega) ku-(200\,W\).
Isixazululo: \( V = \sqrt{PR} = \sqrt{200 \times 25} = 50\,V \)
22. Thola amandla asetshenziswa umshini we-\(500\,W\) osebenza ku-\(5\,h\).
Isixazululo: \( E = Pt = 500 \izikhathi 5 = 2500\,Wh = 2.5\,kWh \)
23. Thola amandla kagesi ebhalbhu ye-\(60\,W\) esebenza ku-\(120\,V\).
Isixazululo: \( I = \frac{P}{V} = \frac{60}{120} = 0.5\,A \)
24. Bala ukumelana kwesibani se-\(40\,W\) esisebenza ku-\(20\,V\).
Isixazululo: \( R = \frac{V^2}{P} = \frac{20^2}{40} = 10\,\Omega \)
25. Nquma amandla kusekethe ye-\(5\,A\) nge-resistor ye-\(12\,\Omega\).
Isixazululo: \( P = I^2 R = 5^2 \izikhathi 12 = 300\,W \)
26. Bala i-voltage edingekayo ukuze ulethe i-\(150\,W\) ku-resistor ye-\(15\,\Omega\).
Isixazululo: \( V = \sqrt{PR} = \sqrt{150 \times 15} = 61.24\,V \)
27. Thola amandla asetshenziswa yi-air conditioner engu-800 egijima isikhathi esingama-3 h.
Isixazululo: \( E = Pt = 800 \izikhathi 3 = 2400\,Wh = 2.4\,kWh \)
28. Thola amandla kagesi kusekethe enamandla angu-\(500\,W\) kanye ne-voltage engu-\(125\,V\).
Isixazululo: \( I = \frac{P}{V} = \frac{500}{125} = 4\,A \)
