Electrical Circuit Power Calculations, Assignments of Electrical and Electronics Engineering

Download Electrical Circuit Power Calculations and more Assignments Electrical and Electronics Engineering in PDF only on Docsity! Pp 36W=Pp Re Vin IR  ⋅( ):= For those who want to use P=VI, choose the correct V and I; don't forget to conjugate the I. Pp 36W=Pp IR( )2 Rp⋅:= IR 3A=IR Vin Rp := It is possible to use I2R. First, find the correct I. Pp 36W=Pp Vin( )2 Rp := Xp j 3⋅ ohm⋅:=Rp 4ohm:=Vin 12 V⋅:= In parallel circuits, the easier way to find power is to use V2/R. PVI 6.897W=PVI Re VR Is  ⋅( ):= For those who want to use P=VI, choose the correct V and I. Don't forget to conjugate the I. Ps 6.897W=Ps VR( )2 Rs := VR 1.379 3.448i− V=VR Vin Rs Rs j Xs⋅+ ⋅:= Here is how to use V2/R. First, find voltage across the resistance in question. Then calculate V2/R Ps 6.897W=Ps Is( )2 Rs⋅:= Is 0.69 1.724i− A=Is Vin Rs j Xs⋅+ := j 1−:=Xs 5 ohm⋅:=Rs 2 ohm⋅:=Vin 10 V⋅:= In a series circuit, the easier way to find power is to find the current and use I2R. Lesson 12 In Class Problem