I = 𝑰 𝑰= 𝑹 𝑹 𝑽= 𝑹= (r = 0, V=vB) 1 2 (V=vB –Ir) 3 (V=vB+Ir) 4 V=vB -I(R+r) 𝑾 𝑸 = 𝑵.𝒆 𝒕 (I) = 𝑰. 𝑹 𝟏 𝝈 , 𝝆𝒆 = (V) (R) (PW) 5 (V=IR) 𝝆𝒆 𝑳 𝑨 𝑸 𝒕 𝐏𝐰 = 𝐏𝐰 = 𝑰𝟐 𝐑 = 𝑾 𝒕 𝑽𝟐 𝑹 Pw = VB .I )(من الطاقة )(للمقاومات )(للبطاريات 5 1 2 1 2 3 ∑V = 0 , ∑VB =∑ IR ∑ I = 0 , ∑ I ∑ = داخلIخارج 1 𝐈 (e) 2 2A 0.5 3 10 10 5 20 4 5 20% 𝟐𝟎% 𝟒𝟎% 𝟐𝟓% 𝟒𝟒% 6 𝐀 = 𝟎. 𝟐𝟓𝐜𝐦𝟐 𝟏. 𝟒𝟒 × 𝟏𝟎−𝟓 𝟓 × 𝟏𝟎−𝟓 I (A) 𝟒. 𝟑𝟑 × 𝟏𝟎−𝟓 𝟏. 𝟐𝟓 × 𝟏𝟎−𝟓 10A 7 12s 5A t (s) 4 8 12 𝛚 8 6 𝛚 7A 𝟔𝝅 𝟒𝝅 𝟐𝝅 𝝅 9 𝑹 𝟐 8R 𝟖 𝑹 𝟑𝟐 𝑹 16V 10 Ω 𝑹𝟕 , 𝑹𝟑 𝑹𝟐 , 𝑹𝟑 𝑹𝟏 , 𝑹𝟐 𝑹𝟕 , 𝑹𝟑 , 𝑹𝟐 11 R 12 6 48 4 12 4 16 6 8 13 𝟑 𝟒 C 𝟒 𝟑 𝟑 𝟐 𝟐 𝟑 14 B D 15 C y Y 16 x 17 6Ω 6 watt 7.4 watt 9watt 18watt 18 5Ω 0.3 A 9Ω 3V 0.5 A 2V 1.2V 1.5 V 19 3 1 20 3 21 S (V) 22 V 16 14 12 10 8 6 4 2 VB I 10 V 6V 12 V 8V 1.5 Ω 1 Ω 0.5 Ω 23 2Ω 1 2 3 4 5 6 7 8 (I) V (V) 24 BA 𝐫𝐀 𝐫𝐁 𝟏 √𝟑 √𝟑 𝟐 + √𝟑 𝟐 − √𝟑 I (A) 23 Ω R 1.25 0.75 0.5 A 5 8 V 16 22 I 7 14 25 26 27 V 16 22 28 I3 I2 I1 I3 1.65 0.72 -2 1.52 I2 0.21 - 1.36 0.4 0.24 I1 1.43 2.08 1.6 -1.28 𝐕𝐁𝟐 29 𝐕𝐁𝟏 𝟑 𝟏 𝟏 𝟑 𝟐𝟓 𝟐𝟏 𝟐𝟏 𝟐𝟓 V2=6V1 A 2.5 2 64V r2 = 2Ω 30 I 1 1.5 Ω 31 R 17 15 20 22 3A Y 32 X 25 14 V…… = VB 20 18