Question (06+06+06+06 ) -

a) Examine and Identify the cause of the followings:

i) The air blast breakers are very sensitive to the rate of rise of re-striking voltage.

ii) Circuit interruption easier in an AC circuit than in a DC circuit.

iii) Surge diverters located very close to the equipment to be protected.

b) Assuming the same peak value, compare the following two surges: 1/50 usec surge and 3/50 usec surge.

Create a PLA, that implements the following functions: F1 = ∑(0, 3, 5, 9) F2 = ∑(1, 4, 8, 12) F3 = ∑(1, 5, 15) F4 = ∑(2, 5, 9, 13, 14)

explain in detail that what effect to peak current if the value of capacitor filter is increased in the DC power supply circuit..

also explain the effect of value of capacitor filter on the ripples and how will we find that of what value of the capacitor should be used for desired ouput

note: DC power supply circuit a circuit composing a transformer, full wave rectifier, capacitor filter,voltage regulator,

also give an example

Answer the followings. Explain in detail.
a) Microprocessors normally use two methods to connect external devices: memory mapped or
port mapped I/O. Compare and contrast these two concepts.
b) Does Intel 8086 processor separate the I/O address space from the memory address space, or
not? Provide your answer clearly. What are the advantageous and disadventageous of such an
approach.

1. Describe the important of meeting in organization.

determine the electric field intensity required to levitate a body 2 kg in mass and charged with -4mc

1. Determine the parity of a continuous signal, apply 5 examples in Octave.

4. i) An input signal of an LTI system is assumed to be a rectangular pulse sequence x[n] of length 2L samples. Represent x[n] in terms of a unit step sequence and sketch x[n] if it turns on at n=0.

ii) Suppose the impulse response of the system is also a rectangular pulse sequence h[n] of length L samples. Represent h[n] in terms of a unit step sequence and sketch h[n] if it turns on at n=0.

iii) Determine the x[n] * h[n] using the geometric series approach

The FM signal (in volts): ∅(𝑡) = 30𝑐𝑜𝑠(2𝜋107𝑡 + 5 sin 2𝜋103𝑡) is present across a 100 Ω resistive load.
a) What is the total average power?
b) What percentage of this power is at 10 MHz.
c) Find the average power in the second-order sidebands.
d) Find the peak frequency deviation.
e) Determine the approximate bandwidth of  ∅(t) using Carson’s rule.

Perform the following task of dc-dc Buck converter. 1). Provide matlab code for DC-DC buck converter

I need matlab code for dc-dc buck converter

Suppose 8086 microprocessor perform the following task: ADD AX, 3FF2H Where the value of AX is 1D56H and ADD is opcode for addition (summation) Draw the flag register and calculate the values of status flags?

Briefly describe the differences between the single pipe circuit and two pipe circuit in space heating aided with diagrams.

Answer all questions. Explain what each of the following is in relation to thermocouples: (a) extension leads, (b) compensating leads, (c) law of intermediate metals, (d) law of intermediate temperature.