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Electronics Engineering
Electronics Engineering is a branch of engineering that deals with practical applications of electronic components, devices, systems, or equipment. Electronics are devices that operate on low voltage sources, as in electron tubes, transistors, integrated circuits, and printed circuit boards and use electricity as part of its driving force.
24,372 Questions
The total resistance in a parallel circuit is the smallest resistor in the circuit?
No, it is less. Use the formula:
1/R = 1/R1 + 1/R2 + 1/R3...
Where R is the total (equivalent) resistance for the parallel circuit,and R1, R2, etc. are the individual resistance.
No, it is less. Use the formula:
1/R = 1/R1 + 1/R2 + 1/R3...
Where R is the total (equivalent) resistance for the parallel circuit,and R1, R2, etc. are the individual resistance.
No, it is less. Use the formula:
1/R = 1/R1 + 1/R2 + 1/R3...
Where R is the total (equivalent) resistance for the parallel circuit,and R1, R2, etc. are the individual resistance.
No, it is less. Use the formula:
1/R = 1/R1 + 1/R2 + 1/R3...
Where R is the total (equivalent) resistance for the parallel circuit,and R1, R2, etc. are the individual resistance.
What are the limitations of conventional tubes at microwave frequency?
2-3Figure 2-1B.-Interelectrode capacitance in a vacuum tube. 100 MEGAHERTZ.Figure 2-1C.-Interelectrode capacitance in a vacuum tube. INTERELECTRODE CAPACITANCE IN ATUNED-PLATE TUNED-GRID OSCILLATOR.A good point to remember is that the higher the frequency, or the larger the interelectrodecapacitance, the higher will be the current through this capacitance. The circuit in figure 2-1C, shows theinterelectrode capacitance between the grid and the cathode (Cgk) in parallel with the signal source. Asthe frequency of the input signal increases, the effective grid-to-cathode impedance of the tube decreasesbecause of a decrease in the reactance of the interelectrode capacitance. If the signal frequency is 100megahertz or greater, the reactance of the grid-to-cathode capacitance is so small that much of the signalis short-circuited within the tube. Since the interelectrode capacitances are effectively in parallel with thetuned circuits, as shown in figures 2-1A, B, and C, they will also affect the frequency at which the tunedcircuits resonate.Another frequency-limiting factor is the LEAD INDUCTANCE of the tube elements. Since the leadinductances within a tube are effectively in parallel with the interelectrode capacitance, the net effect is toraise the frequency limit. However, the inductance of the cathode lead is common to both the grid andplate circuits. This provides a path for degenerative feedback which reduces overall circuit efficiency.
It is the speed you electrical drive device will run when it is just running but has not load.
This would apply to:
a furnace fan motor (or any motor) not connected to the fan
a pump that is running but is not pumping anything
a blender with no mixing container on top
And so on
A logic circuit which determines if one input is equal to another is called?
A XNOR gate for comparing 2 inputs
What are performance parameters of rectifier?
Rectifiers have two parameters of interest - maximum forward current - and maximum reverse voltage. A rectifier is generally chosen based on these two parameters.
Other parameters include turn-on/turn-off time, forward voltage drop, and capacitance. The importance of these and other parameters depends on the circuit design requirements.
Is 1N4007 OA79 silicon or germanium diode?
The entire 1N40xx series of power diodes are all silicon.
The OA79 small signal diode is germanium.
Type your answer here...Casio is made in Japan and Malaysia
Program for block transfer in 8085?
Block transfer in 8085...
PUSH FLAGS {optional, if registers need to be saved}
PUSH B
PUSH D
PUSH H
LXI H,COUNT
LXI B,SOURCE
LXI D,DESTINATION
LOOP LDAX B
STAX D
INX B
INX D
DCX H
MOV A,H
ORA L
JNZ LOOP
POP H {optional, if registers need to be saved}
POP D
POP B
POP FLAGS
Do solar garden lights cause radio interference?
In general, solar powered garden lights won't interfere with radio signals. Solar powered garden lights incorporate a solar cell (or cells) to drive the lights in the fixtures. This is all an issue of direct current and its application. DC (direct current) doesn't generally interfere with radio signals (unless it is switched on and off rapidly, which is not going to be the case with the solar garden lights).
Current and voltage readings taken on the far right of a meters scale provide greater?
Current and voltage readings taken on the far right of a meter's scale provide greater inaccuracy that readings taken from mid scale on the meter.
a: 3.5v/0.014= 250 or 252 a 8 bit conversion will cover that.
When capacitors are connected in parallel, the total capacitance in the circuit in which they are connected is the sum of both capacitances. Capacitors in parallel add like resistors in series, while capacitors in series add like resistors in parallel.
Diesel direct injection system is the latest technology in diesel engine. In this technology multi step injection is done due to this technology engine produce less noise & less vibration.
A 100W 250 V 200W 250V is connected in series across a 500V AC which bulb will fuse first?
both will be fused.
What key factors affect channel capacity?
The following are the major factors can affect network channel capacity:
1.Data rate-----Bits per second
2.Bandwidth---Cycles per second (Hertz)
3.Error rate
This question is hard to answer as the question does not state whether R1 and R2 are in series or parallel with R3. Also helpful would be the source voltage supply and the value of the resistors.
That depends on the memory architecture of the system.
- if the memory chips are byte wide and not used to create a multibyte bus, 11 address bits are needed.
- if the memory chips are 32 bits wide, 9 address bits are needed (with the CPU internally selecting which of the 4 bytes it will use).
- it the memory chips are 64 bits wide, 8 address bits are needed (with the CPU internally selecting which of the 8 bytes it will use.
- if the memory chips are 4 bits wide, 12 address bits will be needed and the CPU must perform 2 memory cycles per byte that it needs. (yes, I have seen a computer that worked this way!)
- etc.
Why we use half adder even when full adder is more usefull?
A half adder has less components, and may therefore be cheaper. So, in cases where all you need is a half adder, it may be more convenient to use a half adder. Or it may be more convenient to mass-produce only the full adders, since a full adder can work as a half-adder as well.Also, in introductory electronics textbooks, the half-adder would be introduced first, just because it is simpler.
Assuming you do indeed mean resistor, depending on the technology used to implement the CPU, resistors may be scattered everywhere throughout the CPU's circuits (e.g. vacuum tube logic, discrete transistor logic, TTL ICs) or there may be no resistors in the CPU's circuits at all (e.g. CMOS ICs).
If instead you misspelled it and actually meant register, there are different places in a CPU where different registers may be implemented:
- general purpose registers are usually implemented in a small very high speed RAM easily accessible to the ALU and memory access circuits
- various special purpose registers are implemented directly in the section of the CPU that uses them (e.g. a program status word register or the instruction register are probably part of the control unit, registers used to maintain the mapping of cache lines to main RAM will be in the cache units)
- if the CPU uses a single accumulator instead of general purpose registers the accumulator will be part of the ALU section
- etc.
(-50-38)2/o.42=419.047619
How are P and N type semiconductors formed?
FORMATION OF P-TYPE SEMI CONDUCTOR A P - type semiconductor is formed when a small amount of trivalent impurity is added to pure Germenium or silicon atom crystal. The addition of trivalent impurity produces a large no. of holes to the host crystals. To explain the formation of P - type semiconductor, let usintroduce a trivalent impurity into the lattice of a pure silicon crystal. The trivalent atom has 3 valanceelectrons and form covalent bonds with neighbouring atoms. The 4th bond is incomplete . the trivalent atom then attracts an electron from an adjacent atom there bycompleting the 4th bond and forming a hole in the adjacent atom. Since a trivalent impurity atom provides 1 hole, an enormous increase occurs in the number of holes. The impure crystals so obtained is called P - type semiconductor where P represents the positive charge on hole. Thus the majority carrier in a P - type semiconductor are holes. Freeelectrons are also present in the P - type semiconductor. These are thermally generated and since they relatively few, they are called minority carriers. The trivalent impurity atoms are called acceptors because each accepts an electron when the atom is introduced into the host crystal.
FORMATION OF N TYPE SEMI CONDUCTOR
An N - type semiconductor is formed when a small amount of pentavalent impurity is added to a pure Germenium or Silicon crystal. The addition of pentavalent impurity produces a large no. of free electrons in the host crystal.
To explain the formation of N - type semiconductor, let us introduce a pentavalent impurity atom into the lattice of pure silicon crystal. The pentavalent atom has 5 valance electrons, but only 4 form covalent bonds with the neighbouring atoms. The 5th electron finds no place in the covalent bonding so becomes free. Since an impurity atom provides one free electron, an enormous increase occurs in the no. of free electrons. The impure semiconductor so obtained is then called as N - type semiconductor where N represents negative charge on an electron. Thus the majority carrier in N - type semiconductor are free electrons. Holes are also present in the N - type semiconductor. These are thermally generated and since they are relatively few, they are called minority carrier.
The pentavalent impurity atom are called donour because each donate a free electron to the host crystal.
What are the main features of instrumentation amplifier in instrumentation system?
High Common Mode Rejection Ratio is the main feature of instrumentation amplifier! And other features are high input impedance, low output impedance, high slew rate, low power consumption, more accurate, easier gain adjustment, low thermal and time drift.
