A 1mc charge is separated from a 3mc charge by 10m. If the P denotes the point of Zero electric field between the charges, determine the distance x, from the 1mc chrage?

a) 3.71m
b) 3.66m
c)3.12m
d)4.36m

Explain using your own figure, the application of Ayrton shunt in an ammeter circuit reflects to the sensitivity of a meter movement

9.8.2 Generation of DTMF Tone

Using firpm function of MATLAB, design a lowpass and a highpass filter to filter
out highpass and lowpass components of DTMF tones, respectively. Do not use very
high-order FIR filters.

1. Generate the signal for DTMF tone ’2’
2. Plot a couple of periods of the signal you generated
3. Plot the spectrum of the signal you generated, comment on the spectrum

9.8.3 Lowpass and Highpass Filters

Using firpm function of MATLAB, design a lowpass and a highpass filter to filter
out highpass and lowpass components of DTMF tones, respectively. Do not use very
high-order FIR filters.

1. Lowpass filter:
a. Filter out the highpass component of the signal you generated through the
lowpass filter designed by firpm. Note: You should use convolution not FFT
b. Plot a couple of periods of the output signal
c. Plot the spectrum of the output signal, comment on the spectrum
2. Highpass filter: Repeat (a,b,c) for the highpass filter

Sketch the closed loop frequency response M(jw) as a function of frequency for a unity feedback system with G(s)=10/s(s+2).

As a Field service team leader, What do you understand by the following:
1. Local access network
2.PABX equipment
3.Broadband
4.Access network field engineering
5.Voice over IP and PABX installation
6.CCNA
7.Rectifiers
8.Chiller Plants
9.UPS

THESE QUESTIONS ARE FROM THE SUBJECT ELECTRICAL MACHINES

1) DEFINE WARD-LEONARD SYSTEM AND HOW IT CONTROL THE SPEED OF MOTOR ,GIVE ITS ADVANTADGES AND DISADVANTADGES ??

2) WHAT IS RHEOSTAT SPEED CONTROL AND HOW IT CONTROL THE SPEED OF MOTOR , GIVE ITS ADVANTADGES AND DISADVANTADGES ??

3) WHAT IS FIELD SPEED CONTROL AND HOW IT CONTROL THE SPEED OF MOTOR , GIVE ITS ADVANTADGES AND DISADVANTADGES ?????

Implement 4-bit binary adder/subtractor using gate level. ( verilog code and test bench)

Explain various control methods for the stepper motor: Full-Step Single-Phase, Full- Step Two-Phase, and Half-Step current excitation sequences.

One of the advantages of using FACTS controllers/devices is can control the power flow during malfunction occurs in the power grid system and thus can prevent a blackout caused by grid malfunction. What is the FACTS controllers' function in such a situation? Explain and elaborate on your answer in detail.

Describe the principles and operations of distance sensor: potentiometer, linear variable differential transformer (LVDT), and optical encoder, state the advantage and disadvantage of each type of distance sensors.

A 200 km, 2.5 Gb/s communication link consists of four spans and three optical amplifiers. The transmitter power is 0 dBm and the fiber loss is 0.25 dB/km. Assume the receiver bandwidth ∆f = 0.7B and responsivity of 0.8 A/W. The operating wavelength is 1.55 µm.
a) What is the span loss? What is the optimal amplifier gain for maximum SNR?
b) If each amplifier has a 4 dB noise figure, then what is the SNR at the output of the last amplifier?
c) Whatis the receiver sensitivity (Q=6)? Will the system work as designed?

Explain what is a short and medium line model in a transmission line. And differentiate a Nominal T and Nominal pi method

Describe the principles and operations of a Solenoid and a Relay; State the difference between a solenoid and a relay; State the advantage and disadvantage of a solenoid and a relay.

Obtain an expression of wave equation of a conducting medium