1)
R=25 Ω
L=200 mH
f=50 Hz
XL=2*π*f*L
XL=2*π*50*200e-3
XL≈62,8 Ω
Z=√(R²+XL²)
Z=√(25²+(2*π*50*200e-3)²)
Z≈67,6 Ω
2)
cos(φ)=0,6
R=75 Ω
XL=?
C=?
cos(φ)=R/(√(R²+XL²)
cos²(φ)(R²+XL²)=R²
XL=R·√(1-cos²(φ))
XL=75*√(1-0,6²)
XL=60 Ω
cos(φ)=1 ⇔ XL=XC
1/(2·π·f·C)=XL
C=1/(XL·2·π·f)
C=1/(60·2·π·50)
C=53 μF
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1)
R=25 Ω
L=200 mH
f=50 Hz
XL=2*π*f*L
XL=2*π*50*200e-3
XL≈62,8 Ω
Z=√(R²+XL²)
Z=√(25²+(2*π*50*200e-3)²)
Z≈67,6 Ω
2)
cos(φ)=0,6
R=75 Ω
XL=?
C=?
cos(φ)=R/(√(R²+XL²)
cos²(φ)(R²+XL²)=R²
XL=R·√(1-cos²(φ))
XL=75*√(1-0,6²)
XL=60 Ω
cos(φ)=1 ⇔ XL=XC
1/(2·π·f·C)=XL
C=1/(XL·2·π·f)
C=1/(60·2·π·50)
C=53 μF