Bantu soal nomor 38 dan 39.......

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38. ][

R = 30 Ω
XL = 50 Ω
Xc = 10 Ω
V = 150 V
ω = 60 Hz

Besar impedansi rangkaian :
Z = √(R² + (XL - Xc)² )
Z = √(30² + (10 - 50)² )
Z = √(30² + 40²) = 50 Ω

Kuat arus pada rangkaian :
i = V / Z
i = 150 / 50 = 3 A ✔

39. ][

N = 50
R = 5 Ω
Φ = 10⁻⁴ sin (3 × 10³ t)

Besar GGL INDUKSI :
ε = - N dΦ / dt
ε = - 50 d(10⁻⁴ sin (3 × 10³ t) ) / dt
ε = -15 cos (3000t)
Abaikan saja tanda Minus , shg :
ε = 15 cos (3000t)

ε maksimum saat cos (3000t) = 1 [Nilai cosinus maksimum = 1] :

a. εₘₐₖₛ = 15 × 1 = 15 Volt ✔

b. iₘₐₖₛ = εₘₐₖₛ / R
iₘₐₖₛ = 15 / 5 = 3 A ✔

38.
Diket :
R = 30 Ω
XL = 50 Ω
Xc = 10 Ω
V = 150 V
ω = 60 Hz

Dit : i...???

Menghitung Z :
Z = √(R² + (XL - Xc)² )
Z = √(30² + (10 - 50)² )
Z = √(30² + 40²)
Z = 50 Ω

menghitung i :
V = i Z
i = V / Z
i = 150 / 50 = 3 A

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