PROBLEM- A 50-HP DC motor operates from a 220Volt DC source With Power Loss 3,350 w rated at full-load conditions. The speed at full-load is 1150 rpm. the speed without Load is 50 rpm more. Find: a) The Source Current b) The efficiency of the motor under full-load. c) The speed regulation d) Any comments on efficiency and speed regulation? Are they suppose to be where theory says to be?

EECE205-Linear Circuits II w/Lab 1. Via the convolution integral, determine the output vo(t) = h(t) * u(t), where (a) vi(t) = u(t+2) - u(t− 2) = h(t). Also, sketch the output in time domain. (b) vi(t) = 3u(t - 2) and h(t) is the impulse response of the circuit shown in Fig. 1 - {pl = and h(t) is the impulse response of the circuit shown in Fig. 1 (c) vi(t) 4 exp(-2t+8) Vi 0≤t≤4 4 ≤t otherwise 50 mH 5 1.2 ΚΩ Figure 1: Circuit for Question 1 Vo Summer 2023

Problem (1) A resistive load connected to the circuit inside the box as shown. The measured currents through the load for different values of R, are given in the table below. Find the Thevenin equivalent for the circuit inside the box. R₁ 10kQ2 30kQ2 IL 1.5mA 1.2mA | RL 10 points

Problem (2) Find the Thevenin equivalent seen by the resistive load R₁ Find the value of R₁ such that the power transferred to the load is maximum. Calculate the maximum power transferred. Calculate the maximum power transferred Find new value of R₁ such that the load voltage v₁ = 2V. Calculate the power absorbed by the load Find another new value of R₁ such that the load current i = 0.5 mA. Calculate the power absorbed by the load a 2mA (1) ww- 4kQ2 3kQ R₁ ww WWW 10 points www. b 6kQ 3V

Problem (3) Find the Thevenin equivalent between node (a) and (b) for the circuit below 24V + 3ix 292 4A (↓) ·892 a b 10 points

Problem (4) For the circuit below, the circuit below, the 2k is a fixed resistive load. Adjust the position of the potentiometer, by finding the value of Rx, such the power delivered to the load is maximum. Adjust the position of the potentiometer, by finding the value of Rx, such the voltage across the load is maximum. 10V + 5ΚΩ www- 10kΩ Rx ww- 2kQ 10 points

a) What is the mathematical difference between the peak amplitude and RMS value of any given voltage sine wave? b) If the peak amplitude of a voltage sine wave is 144V, what is the RMS value of the sine wave?

Problem 2: (Lab 1) The earth ground resistance at the base of a transmission tower is 5 0. If the tower is struck by a lightning bolt of 100kA, how much power will be dissipated in the ground?

Problem 5: (Lab 3 Exercise 1) a) What is the ratio between the line voltages and the ratio between the line currents in a wye- wye connected, three-phase circuit? b) What is the ratio between the line voltages and the ratio between the line currents in a delta- delta connected, three-phase circuit?

Problem 4: (Lab 2 Section 1-3) What is the average power dissipated by a 1.5k0 resistor when it is connected to an ac source having an amplitude of 240 V? ●