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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
When was radar first used in world war 2?
One of the first uses was during the Battle of Britain. British radar would detect oncoming German airplanes and the British would send up the Supermarine Spitfire to shoot down fighters and the Hawker Hurricane to shoot down bombers. Radar let the British use their aircraft to their best advantage. Instead of constantly flying air patrol, they could take off when the enemy was coming, and attack them where they were. It was the advantage of radar that enabled the British to defeat the Germans and showed once and for all time, the importance of radar in air combat.
What happens to the current in a circuit when the resistance is increased?
The flow of electrons meets an increased impedance to it's flow.
Where was the overhead projector invented?
A man named Jenkins, not sure of the first name, made various technical improvements in Movie Projectors in the twenties. He was also an aircraft pilot of the experimental type- light seaplanes, as I recall, and WA ssomething of a TV pioneer as well, a versatile inventor! Jenkins Radiovision was his big, but somewhat obscure (Hit) a form of television device.
Is the word North Star capitalized?
Yes, it is a word. I am almost completely sure it is the study of astronomy.
The time constant of a circuit that contains inductance and resistance follows what type of curve.?
1.cosine 2.exponential
3.min-max value
4.sine
What is the function of an IC UM3561?
it is used to generate 4 kinds of sounds-police siren,fire alarm,ambulance and gun siren
Purely additive. 2+3+4+5+6=20.
Least Significant Bit. Least Significant Byte. (Depends on use.)
Do LCD TVs use cathode ray tubes?
Some early flat screen TVs used cathode ray tubes, but the flat faced tubes were harder to make and heaver than the older curved faced tubes. When newer designs (e.g. plasma, LCD, LED) came out that naturally produced flat screens and were lighter weight than cathode ray tubes, they rapidly made flat screen cathode ray tube TVs obsolete.
What the advantages of active and passive device?
An active device is any type of circuit component with the ability to electrically control electron flow (electricity controlling electricity). In order for a circuit to be properly called electronic, it must contain at least one active device
Can more than one resistor be used in a circuit?
Yes, more than one resistor can be used in a circuit. Resistors can be connected in series, where their resistances add up, or in parallel, where the total resistance decreases. This allows for greater control over the current and voltage levels within the circuit, enabling designers to achieve desired electrical characteristics. Using multiple resistors can also help in managing heat dissipation and improving circuit functionality.
What is stability of transistor?
Transistors need thermal stabilization because the operating point of a transistor junction, similar to a diode, is affected by temperature. In fact, this can cause thermal runaway, and device destruction, if the circuit design does not compensate for this.
Answer mostly correct but the operating point of a transistor must remain fixed as temperature varies whether going low or higher. that is mainly the concern about. not runaway that is caused by bad design.
What are composite signals why you needed?
In case of TV broad casting, the Video Signal is not transmitted alone, but it accompanied by a number of other signals or pulses, which help the exact reproduction of the picture at the receiving end. These pulses include Blanking Pulses, Synchronizing pulses and Equalizing pulses. A combination of Picture signal and other Controlling signal or pulses is called Composite Signal. Thus Composite Video Signal may consist of Following Parts.
- Picture information (Data)
- Blanking Pulses (Delay Pulses)
- Vertical and Horizontal Synchronizing Pulses (controlling Pulses)
Generally,
A Combination of Data and Other Controlling Signal is Called Composite Signal .
Inductive reactance is equal to capacitive reactance?
yes,they are equal at only one condition i.e. when the circuit containing R,L and C in series or in parallel behave as a purely resistive circuit. This condition occur only at resonance.
What is the advantage of opto-isolator?
An opto isolator is an electronic device that prevents high voltages from components in one side of a circuit from damaging or interfering with components on the other side of the same circuit.
Is there a magnetic field around current carrying conductors?
yes.magnetic field present around the conductor.
current and magnetic fields are inter related..
with current we can produce magnetic field and vice versa
How do you implement 8-bit comparator using two 4-bit comparators?
set the < , =, > as "010" and connect the lower bit that you want to compare to the first comparators and connects its output to the input of second comparator like this; connect the P<Q to < , and P=Q to = and P>Q = > (cascading input is checked for when P and Q are equal; the input from cascading input is set to the output "010"
What are the applications of CMOS?
cmos technology is used in low power applications in vlsi and also used in image processing.cmos inverter has many applications like oscillator,amplifier and also used in analog transmission,digital applications etc.,
What kind of material are in most conductors?
Most conductors contain metals. These provide the free electrons, which can pass a current.
