The efficiency of a 400-kVA, single-phase, 60-Hz transformer is 98.77% when delivering full-load current at 0.8 power factor, and 99.13% with half-rated current at unity power factor. calculate: (a) The iron loss. (b) the full-load copper loss. (c) the efficiency at 3/4 load, 0.9 power factor

Assuming that the length of a lossless transmission line with the normalized load impedance of zL = ZL/Z0 = 1 + j1 is l = 2.25λz , there are a total of (A) 2 voltage maxima and 2 voltage minima (B) 2 voltage maxima and 3 voltage minima (C) 3 voltage maxima and 2 voltage minima (D) 4 voltage maxima and 4 voltage minima (E) 4 voltage maxima and 5 voltage minima (F) 5 voltage maxima and 4 voltage minima on the line.

Use Omron PLC
a) Create a ladder diagram (logical) that a bulb indicates when a box is filled with 10 items.
b) Write (make) the programming (mnemonic) language
c) Describe (write with your word) the sequence of operation of the system that you performed in part a and b.

Draw diagram showing 8088 microprocessor connected to 4 memory chips each of 32K, mapped to memory address starting from D0000.

C: Postlab Section: Design Calculation

1. Show the state table of 4-Bit synchronous binary counters.

2. Derive the transition table for JK flip-flop.

3. Derive the logic equation using Karnaugh Map.

4. Draw the corresponding logic circuit.

5. Draw the timing diagram for the circuit.

6. By observation on the 3-bit and 4-bit counter circuit, you should see a pattern. Apply the pattern to construct a 5-bit counter without going through the 5 steps above.

An unbalanced wye connected wye connected load of three phase resistances with Ra=60 ohms, Rb=40 ohms and Rc=80 ohms is connected to a 440V, negative sequence, balanced 3 phase, 3 wire supply. Calculate the complex power using the method of symmetrical components.

Please show all steps and clearly show all answers.

Consider the differential equation y′′(t)+15y′(t)+56y(t)=−210exp(-1t),
with initial conditions y(0)=−14, and y′(0)=72.

A)Find the Laplace transform of the solution Y(s). Write the solution as a single fraction in s.

Y(s)= ______________

B) Find the partial fraction decomposition of Y(s). Enter all factors as first order terms in s, that is, all terms should be of the form (c/(s-p)), where c is a constant and the root p is a constant. Both c and p may be complex.

Y(s)= ____ + ______ +______

C) Find the inverse transform of Y(s). The solution must consist of all real terms.

L−1{Y(s)} = _______________________

Coin toss experiment

In this experiment, determine the number of heads and tails after flipping a coin for 1000 times. Use two different methods to find number of heads and tails:

• Use for loops.

• Use vectors in MATLAB.

  Repeat this experiment to find running average of flipping a coin for 200 and 2000 times. Plot the running average for two experiments using subplot functions.

A   three-phase,   460-V,   60-Hz,   six-pole   Y-connected   induction   motor   has   Rs = 0.32 Ω, R′ r = 0.18 Ω, Xs = 1.04 Ω, X′ r = 1.6 Ω,   and   Xm = 18.8 Ω.   The   no-load   loss,   Pno load,   is   negligible.   The   load   torque,   which   is   proportional   to   speed   squared,   is   180 N#m   at   1180   rpm.   If   the   motor   speed   is   850   rpm,   determine   (a)   the   load   torque   demand   TL; (b)   the   rotor   current   I′ r; (c)   the   stator   supply   voltage   Va; (d)   the   motor   input   current   Ii ; (e)   the   motor   input   power   Pi; (f)   the   slip   for   maximum   current   sa; (g)   the   maximum   rotor   current   Ir1max2; (h)   the   speed   at   maximum   rotor   current   ωa;   and   (i)   the   torque   at   the   maximum   current   Ta.

A carrier signal of (500 kHz) is amplitude modulated to a depth of 75% by a single tone modulating signal of 18 KHz. The carrier amplitude is 800 Volts , and the antenna equivalent impedance is 70 Ohms. Calculate:

1- modulating wave voltage (Am) [volt]

2- The carrier power (Pc) [Watt]

3- The average output Power (Pt) [watt]

4- The percentage transmission efficiency [%]

5- The lower side band power (PLSB)

Design a RAM circuit such that using two 64x16b RAM chips constructs a

128x16b effective size memory circuit. Use the MSB of the address lines as the enable line.

(Note: you will need to determine the number of address lines needed.)

Why in a metal parallel-plate waveguide does TM0 exist and TE0 does not? Or is it the other way around?