Kunci jawaban energi dan daya listrik

I

1. A
2. C
3. C
4. C
5. A
6. D
7. A
8. A
9. C
10. B
11. D
12. A
13. B
14. D
15. B
16. A
17. D
18. D
19. C
20. D

II

1. diket : V = 220 V , I = 2 A, dan t = 5 menit = 5 x 60 = 300 s

ditanya : W ….?

Jawab :                 W = V x I x t

                                W = 220 v x 2 A x 300 s

                                W = 220 x 600

                                W = 132.000 J

2. diket :   R = 600 ohm

I = 0,5 A

t = 6 menit = 6 x 60 = 360 s

                Tanya : Q…?

                Jawab :                 Q = W = I² x R x t

                                                Q = (0,5)² x 600 x 360

                                                Q = (0,25) x 216.000

                                                Q = 5400 J

3.  http://netsains.com/2009/04/bagaimana-lampu-hemat-energi-bekerja/
4. Diket : V = 220 v, P = 100 w, t = 10 x 60 = 600 s

Ditanya : Q…..?

Dijawab :             Q = w = P x t

                                Q = 100 x 600

                                Q = 60.000 J

5. I believe that you can answer by yourself :)