4. In the following circuit VF-110 Vrms and Z = (25 + j10) 22. a. Calculate VAB (Vrms) in polar form. b. Calculate Z in polar form. c. Calculate the phasors of the currents in each impedance Z in polar form. Help: it is not necessary to make nodes or meshes; the current through the vertical impedance is VAB/Z and the current through the other two will be VAB/(2Z). A Z VfZ0° V Z B Z VfZ-120° V

Three impedances, Z1 =10020.Q, Z2 =63.2518.43.2 and Z3 =1002-90•Q are connected in star. Convert the star to an equivalent delta connection. And draw the star network and also the equivalent of delta connection

Consider the following circuit used to provide power for an inductive RL load. The input voltage is Vs-100V and the load has a 50 impedance value. The thyristor is working at a frequency fs = 2 kHz. The discharge current is to be limited to 40A and the required dv/dt is 40V/us. If the value of Cs is equal to 0.14uF, then the snubber losses are equal to: T1 Vs Select one: O a. 3.4W O b. 1.4W 5.4W Od. 7.4W

a) Determine the phasor voltage Vc, the real and reactive power of the source for the circuit of Figure Q5a. V₂( j200 -j1092 ==== 1092. j1092 1092 2020 Vrms Figure Q5a -j1092 + Vc

Impedances Z1=5.83<-59 and Z2=8.94<63.43 are in series and carry and effective current of 5.0 A. Determine the power factor and state whether lagging or leading. Show your solutions.

write a report to compare between ac througe capactance and ac throughe in inductance then:for the cirucit shown beside, find the total impedance between a & b and cirucit current (I)

An impedance z₁ = 8j5ohms is in parallel with an impedance z₂ = 3 + j7ohms. If 100V are imposed on the parallel combination. Find the branch current 11, 12 and the resultant current. Draw the corresponding phasor diagram showing each current and voltage drop across each parameter. Calculate also the equivalent resistance, reactance and impedance of the whole circuit.

Consider the following circuit used to provide power for an induative RL load. The input voltage is V-100V and the load has a 50 impedance value. The thyristor is working at a frequency fs = 2 kHz. The discharge current is to be limited to 40A and the required dv/dt is 40V/us. If the value of Ce is equal to 0.14uF, then the snubber losses are equal to: R. V. Select one: O a 5.4W O b. 7.4W 1.4W Od. 3.4W

6-10) Using what you have learned constructing the phasor diagram for the LRC series circuit, construct a diagram for the LRC parallel circuit. Derive an expression for the circuit impedance Z and the phase angle φ between the applied emf and the current supplied by the emf. HINT: in the series circuit, the current through all four components was the same. Ask yourself what the components in this arrangement have in common.

H.W 2 An AC circuit includes two sections AB and BC in series. The section AB consists of two branches in parallel. The first of these is formed of resistance of 60 2 in series with a capacitor of 50 mF, while the second consists of a resistance of 60 2 having an inductance of 250 mH. The section BC consists of a resistance of 100 N having an inductance of 300 mH. The frequency of the current is 50 Hz. The voltage across section AB is 500 V. What is the voltage across the section BC?