161⟩ Why does mode in arm in cpsr have 5 bits instead it can have only 3 bits to define all the 7 modes?
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185 Electronics Engineering Questions And Answers
162⟩ Explain the approximate cost of the following corrosion monitoring systems. Smart pebbles ECI-1(Embedded corrosion instrument) Monitoring cables Time Domain Reflectometry &Corrosion Penetration Monitoring system(CPMP)?
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163⟩ Water boiling point temperature is 100 deg. in which liquid state is convert into the gas state,but in turbine which principle is use by which exhaust temperature is 50-55 deg and is in the stage of steam?
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164⟩ Explain the importance and effect of IF IN radio receiver?
The superhet rodyne receiver is quite important in a radio receiver.
It enable the receiver to use a single frequency as the center frequency of the band-pass filter. this frequency is the Intermediate Frequency (IF).
The received signal is going through a frequency translation (in practice it goes through a mixer), which makes it
IF centered.
It should be noted that a static filter is much easier to build and is much more efficient.
165⟩ Tell me what is the max. or min . value of TV in MSA to calculate R&R?
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166⟩ A description of the fundamental elements that are required to make a digibox. I assume that they all record nowadays?
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167⟩ Explain differences between microprocessor and micro controller?
The microprocessor is the integration of a number of useful functions into a single IC package.
These functions are: The ability to execute a stored set of instructions to carry out user defined tasks. The ability to be able to access external memory chips to both read and write data from and to the memory.
Basically, a microcontroller is a device which integrates a number of the components of a microprocessor system onto a single microchip.
So a microcontroller combines onto the same microchip : The CPU core Memory (both ROM and RAM) Some parallel digital I/O Essentially, a microcontroller is obtained by integrating the key components of microprocessor,RAM, ROM, and Digital I/O onto the same chip die. Modern microcontrollers also contain a wealth of other modules such as Serial I/O, Timers, and Analogue to Digital Converters.
168⟩ What is hybrid parameter?
the h-parameter or the hybrid parameters of a transistor helps us to analyse the amplifying action of transistor for small signal .
169⟩ How many 21 multiplexers do we need to make a 2 input XOR gate?
A xor B= A'B + AB'
hence, if A=0, then the output is B
if A=1, then the output is B'
so we need only ONE mux (2:1), which is controlled by A, and its inputs are B --> mux_in_0
B' --> mux_in_1
170⟩ Explain what is the meaning of Tristate Signal in Electronics?
An active digital line in case of multiplexed buses has three states. high & low when controlled, and tristated when not controlled or when it is free to be used by other controller. this state where in it's level is not determinable or when it is floating is called tristate.
171⟩ Why do we use two ground pins in the pin diagram of 8086?
There are basically two reasons for doing so, one is to remove GROUND BOUNCE one more reason is circuit complexity demands a large amount of current flowing through the circuits, and multiple grounds help in dissipating the accumulated heat so that device will be safe.
172⟩ Explain why BJT is known as current controlled device and FET is known as voltage controlled device?
BJT as current controlled device -
Base current controls the collector an emitter currents
FET as voltage controlled device-
Field of p or n region decides width of conducting channel in n type or p type FET
173⟩ Suppose if there is the level of impurity in p-type & n-type semiconductor of pn junction diode is different then what effect on depletion?
there will be a change in the depletion width.. higher the doping concentration smaller the width
174⟩ Explain difference between DCS & PLC & SCADA?
PLC stands for Programmable Logic ControllerDCS for Data control SystemSCADA for Supervisory Control And Data Acquisition SCADA involves supervision by a user, in most cases the plant controller.Whereas PLC is the means by which he performs the function of SCADA.DCS on the other hand stand only to control the system and not to log any datain the process of controlling.
175⟩ Explain Find Conductivity, Resistivity and Resistance?
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176⟩ Explain how to manufacture the CMOS inverter?
by connecting a pmos transistor and cmos transistor in series and take the output from middle of the connection
177⟩ How to calculate the rectangle of conductor of different sizes?
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178⟩ What is Edison Effect?
In a conducting material, the electrons are governed by Fermi-Dirac statistics. The baseline electron energy is the Fermi Energy*, and at low temperatures the electrons all exist at or below this level. As temperature is increased, so the distribution function for the electrons develops a high energy 'tail'. Some of these electrons have sufficient energy to pass over the surface potential barrier between the material and the vacuum. This process of increasing the temperature of a bulk material to increase the number of electrons which can leave the material is called thermionic emission or Edison effect.
179⟩ Explain design 8421 to 2421 binary code converter?
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180⟩ Explain what is meant by saying at what current is transistor biased?
Bias current of a transistor is the preset DC current when no input voltage signal is applied to it.
