1. Discuss what will happen to the modulation process of an amplitude modulation (AM) signal if the carrier signal level remains constant and the sideband signal level increases and justify your answer

2. A normal modulation usually has a modulation index ranges from 0 to 1 but in some rare cases, the modulation index can be greater than 1. Discuss what will happen to the output of the receiver if this situation happens.

Consider the transfer function G(s) = 1/[(s+1)^2(s+2)]. We use a PI compensator C(s)=(as+b)/s and close the feedback loop.

1.) Find out the entire range of a and b at which the closed-loop is stable and show it on the plane with a and b axes.

2.) At the border of instability, find the frequency of oscillations in terms of a.

3.) For what value of a, do we get the largest range of b for stability? What is this largest range?

A parallel-plate vacuum capacitor has 8.22 JJ of energy stored in it. The separation between the plates is 3.50 mmmm.

Part A

If the separation is decreased to 1.80 mmmm, what is the energy now stored if the capacitor was disconnected from the potential source before the separation of the plates was changed?

Express your answer in joules.

U = ?? J

Part B

If the separation is decreased to 1.80 mmmm, what is the energy now stored if the capacitor remained connected to the potential source while the separation of the plates was changed?

Express your answer in joules.

U = ?? J

(A) - sketch a 4bit R-2R ladder digital to analog converter with reference voltage,Vref=10. by using thevenin theorem,derive the expression of Vout when MSB only turn 'on',LSB only turn 'on' and for an input B3B2B1B0 = 1010 and general expression for Vout

(B) -- based on question (A) calculate Vout using the data in the table below

Explain the relevance of earthing and bonding in an electrical Installation.
(b) Explain how a load is wired to an MCB and how the MCB is supplied with power from
the distribution board.

An air-filled parallel-plate capacitor with plate separation d and plate area A is connected to a battery that applies a voltage V₀ between plates. With the battery left connected, the plates are moved apart to a distance of 10d. Determine by what factor each of the following quantities changes: (a) V₀; (b) C; (c) E; (d) D; (e) Q; (f ) ρ_S; (g) WE. Repeat the exercise for the case in which the battery is disconnected before the plates are separated.

Updates Question.                                         Consider the full- bridge single-phase inverter with input voltage equal to 400V. This inverter is controlled by unified PWM technique.The aim is to generate a half-wave symmetry waveform with 5 pulses in each half-cycle.The RMS and frequency of output voltage are assumed 100V and 50Hz, respectively.        a) Draw its power circuit.                             b) Obtain the switching table of the inverter.                                                          c) Calculate the width of each generated pulses at the output voltage.                        d) Find the amplitude modulation index.    e) Obtain the frequency modulation index.                                                               f) Calculate the frequency of carrier signal.                                                               g) Draw the waveforms of refrence and     carrier signals.                                                 h) Obtain the waveform of the output voltage.                                                           i) Design the trigger signals of switches.    j) Calculate the amplitude of fundamen-    tal component.                                               Thanks for your help.

question 1. in no more than 100 words how to give technical comments for (cattle or anythings you found, for example, laptop, keyboard, phone, supper cars) I'm just looking for how to make positive comments on one of these things.

question 2. in no more than 100 words based on question 1 explain how you intended the recipient to benefit from the comments (feedback).

What is close loop and open loop in controls, what are the differences and what are their similarities. Please illustrate using a block diagram if possible

Design and simulate a Half and Full wave rectifier for a 12V AC supply with 60 Hz frequency.

Please use online multisim

and calculation

I am trying to write the code for an 8 bit adder in VHDL so that I can program it onto my Elbert V2 Spartan 3A FPGA Development Board, but I keep getting errors. Any ideas what I am doing wrong?

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;

entity adder8bit is
Port ( a : in STD_LOGIC_VECTOR(7 downto 0);
b : in STD_LOGIC_VECTOR(7 downto 0);
cin : in STD_LOGIC;
o : out STD_LOGIC_VECTOR(7 downto 0);
cout : out STD_LOGIC);
end adder8bit;

architecture Behavioral of adder8bit is

component fulladder is
   Port ( a : in STD_LOGIC;
b : in STD_LOGIC;
cin : in STD_LOGIC;
o : out STD_LOGIC;
cout : out STD_LOGIC
);
end component;

signal c : STD_LOGIC_VECTOR(6 downto 0);

begin

PROCESS (a,b,cin)
BEGIN

o(0) <= a(0) xor b(0) xor cin;
c(0) <= (cin and b(0)) or (cin and a(0)) or (a(0) and b(0));

for i in 1 to 7 loop

o(i) <= a(i) xor b(i) xor c(i-1);
c(i) <= (c(i-1) and b(i)) or (c(i-1) and a(i)) or (a(i) and b(i));

end loop;

cout <= c(6);

END PROCESS;

end Behavioral;

An AC power supply is in series with a 30 μF capacitor and a parallel structure with a 100 Ω resistor and a 300 mH inductor. The power supply produces electricity at frequency of 60 cycles / second with an RMS voltage of 120.0 V.

a) What is the formula (including appropriate units) for function of the voltage of the power supply (w.r.t. time when time is in seconds) assuming the voltage was started at its maximum positive value?

b) Draw the full phasor diagram when the resistance voltage phasor is at π/6 . Include identifying angles for the 8 phasors ( ε_0,V_r ,V_c ,V_L ,I_p ,I_r ,I_c ,I_L ).

c) What are the equations for the voltages across and currents into each component? (There are 8 equations in all.)

d) Assume the voltage from the power supply starts at its maximum positive value, what is first time when resistance voltage phasor is at π/6 ?

e) At that moment in part (d), what are the instantaneous voltages across each of the four components, and what are the instantaneous currents into each of the four components?