[Q3) Consider the circuit shown in Fig. 3, where both the resistance R and the reactance X are variable. Answer the following questions. (1) The circuit on the left side of the terminal pair 1-1' in Fig. 3(a) is equivalent to the circuit in Fig. 3(b). Find the voltage Eo and the impedance Zo. (2) When the power consumption P at the re- sistance R is maximized with respect to R and X, find the maximized power con- sumption Pmax and the values of R and X. JD-je= Eo ΖΩ (a) Zo (b) Fig. 3 -jn 1' 1' R jX

Discussion ‘@K 1. Gonnect the circuit as in Fig. 5. Txkc v Q‘%@ R 27KE quation (fin the m), calculate the = V,-8 V. With the help of branch currents Iy, Iz, and B 2. Using Circuit in F ¢ principle, calculaie the no Compare the theoretical and €X & l,, Ip, and . ital results. 2

The transformer in the circuit shown in Fig. 1(a) is an ideal transformer with a=1/3. The circuit is supplied from a sinusoidal ac source with a frequency 60 Hz. Determine the angular speed ω. Determine the source voltage RMS value. Express the supply voltage as a function of time. Calculate the load resistance value (9 Ω) referred to the transformer low voltage side. Calculate the circuit equivalent resistance as seen by the source. Calculate the current drawn from the supply. Calculate the load voltage Vo. Calculate the power dissipated in the 3 Ω resistor. Draw, to scale, the phasor diagram including: supply voltage, supply current, load voltage and load current.

Q1)- Galvanometer converted to multi range voltmeter showing in fig-1- with voltage ranges Of (V b,V c. Vd,Ve ).designed by a basic d Adrsonval , Rs1, Rs2, Rs3, Rs4,(3Kohm, 16Kohm.25Kohm,50Kohm).respectively, with internal resistance ( Rm =120 ohm „Im=600macroA connected with parallel resistance (30 ohm) calculate: (V 1,V2 V3 ,V 4 ). by using un direct Sensitivity method