Write a verilog code for 5 to 8 multiplier using fourbit adder

- Single phase controlled bridge type rectifier circuits;
a. Drawing circuit shapes, input voltage and wave current of load current and load voltage at pure resistive load
Explain in the angular velocity axis. (10 points)
b. Prove mathematically how load voltage values are calculated, (10 points)
c. How the output waveforms will be affected if the R-L charge feeds instead of the pure resistive charge, and
you explain the reasons for this with waveforms and mathematically. (10 points)

d) As a technician who worked at the plant you named in (c), discuss TWO (2) ethical issues that you may encounter at your workplace. Then, suggest an appropriate action to overcome the issues.

Model a BCD to 7-Segment Decoder

（1111 1000）

Create a top-level Verilog module, named bcdto7segment_dataflow with 4-bit data input (x[3:0]),

anode enable output signals (an[3:0]), and 7-bit output (seg[6:0]) using dataflow modeling (Hint:

You will have to derive seven expressions for the 7 segments on paper). Assign appropriate logic

to an[3:0] in the model so you can display only on the right most display.

The electron mobility is …

If for a uniform field the product of discharge gap spacing by gas pressure remains constant, the breakdown voltage is …

What differences are there between a FIR filter and an IIR filter?

What is a csv file and how does database work in general?

Describe the operation of an OPAMP-based oscillator using the concept of a basic oscillator feedback circuit. Your description must include all pertinent equations relating the overall closed loop gain and the open-loop and feedback gain

The positive-sequence line impedance as well as CT and VT ratios at B1 for the 33 kV system as shown in Table 1 and Table 2 below :

Table 1

Table 2

Zone 1 reaches 90% of the protected line while zone 2 extend beyond the protected line up to 50% of the adjacent line and Zone 3 covers the protected line up to 25%. Determine the settings Zr1, Zr2 and Zr3 for the B1 three-zone, directional impedance relays. Draw its MHO relay diagram and impedance relay diagram.

Currently, this model detects the overlapping sequence "101" ----> REDESIGN the Moore FSM below to detect the NEW sequence "011" , simulate using the same test bench, and create a Moore Transition Diagram for the new sequence 011.

module moore_seq
(
   input clock, reset, x,
   output reg z
);
//assign binary encoded codes to the states A through D
parameter
   A = 2'b00,
   B = 2'b01,
   C = 2'b10,
   D = 2'b11;
reg [1 : 0] current_state, next_state;

//Section 1: Next state generator (NSG)
always@(*)
begin
   casex (current_state)

   A: if ( x == 1)
       next_state = B;

   else

       next_state = A;

   B: if (x ==1)
       next_state = B;

   else

       next_state = C;

   C: if (x == 1)
       next_state = D;

   else

       next_state = A;

   D: if (x == 1)
       next_state = B;

   else

       next_state = C;

   endcase
end

//Section 2: Output generator
always@(*)
begin
   if (current_state == D)
       z = 1;
   else
       z = 0;
end

//Section 3: The Flip-flops
always@(posedge clock, posedge reset)
begin
   if (reset == 1)
       current_state <= A;

   else

       current_state <= next_state;
   end

endmodule

// This the test bench

`include "moore_seq.v"

module moore_seq_tb();

reg clock, reset, x;

wire z;

moore_seq u1(clock, reset, x, z);

initial begin
$monitor("%4d: z = %b", $time, z);
clock = 0;
reset = 1;
x = 0;
#10 reset = 0;
end

always begin
#5clock = ~clock;
end

initial begin

#10 x = 1; $display("%4d: x = %b", $time, x);
#10 x = 1; $display("%4d: x = %b", $time, x);
#10 x = 1; $display("%4d: x = %b", $time, x);
#10 x = 0; $display("%4d: x = %b", $time, x);
#10 x = 1; $display("%4d: x = %b", $time, x);
#10 x = 0; $display("%4d: x = %b", $time, x);
#10 x = 1; $display("%4d: x = %b", $time, x);
#10 x= 1; $display("%4d: x = %b", $time, x);
#10 x = 0; $display("%4d: x = %b", $time, x);
#10 x= 0; $display("%4d: x = %b", $time, x);
#10 $finish;
end
endmodule

MACHINES ONE LAB TEST QUESTIONS.

QUESTION 1.

(a) Why are the exciters poles in DC machines broad ended?

(b) Why is the armature of a DC machine always made to be the rotor?

(c) Give three main advantages of transformers no load and short-circuit tests. Include circuit diagrams

(d) Explain why the short-circuit test is said to help determine the full-load copper losses. Use elaborate labelled diagram as well as formulas in your explanation.

(e) Explain why Zambia electricity supply corporation limited uses back to back no-load test. Draw the circuit diagram for that arrangement.

(f) A 220V/12V transformer is supplied from a car battery on its secondary side. Explain the behaviour of the machine in terms of:

1. Output voltage, transient and steady

2. Power dissipated and output

3. Usefulness compared to AC input

There was basically no electricity 150 years ago. Tesla, Edison and Faraday were experimenting and it was believed to be dangerous, so no electric anything. They used wood and coal fired brick and iron ovens and fire places. The lighting was oil and gas lamps and candles, hence the saying “Burning the midnight oil.”

I have lived with little (generators and solar power) or no electricity in the deep desert in Saudi Arabia, in the mountains on expeditions and after hurricanes Irene and Maria in the Caribbean.

Today fossil fuels and electricity are the foundation of our civilization.

How will we continue to make electricity in the future?

Any other research examples?

Explain how the performance of induction motor can be predicted by circle diagram. Draw the circle
diagram for a 3-phase, mesh-connected, 22.38 kW, 500-V, 4-pole, 50-Hz induction motor. The data
below give the measurements of line current, voltage and reading of two wattmeters connected to
measure the input :
No load 500 V 8.3 A 2.85 kW − 1.35 kW
Short circuit 100 V 32 A − 0.75 kW 2.35 kW

A three-phase balanced star load No. 1 of (120 +j90) ohms in parallel with another three-phase balanced star load No. 2 of (90 +j120) ohms, both are fed by three-phase balanced conductors of 3 ohms resistance and 4 ohms reactance. If the generator is 240 volts, with angle of -150° on phase c and reactance of 1 ohms, determine: a) the current on load N°1 on phase C, b) the terminal voltage of the generator on phase B, c) the voltage on load N°2 on phase A and d) the efficiency of the conductors.

. A continuously operating coherent Binary Phase Shift Keying (BPSK) system is made by an engineer. He claims that it is having an average error probability of 10-5. The system produced 1000 errors in a day when tested with a data rate of 1000 bits/s and the single-sided noise power spectral density is No=10-10 W/Hz. He also claim that the system is capable of maintaining the error rate even if the received power is as low as 10-6 W. Do you agree with his claims? Give justifications to your answer.