0
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
What is constant speed DC motor?
Dc shunt motor is constant speed motor.Its speed is constant with armature current.This shunt motor is used in paper mills and drilling machines
Can you use a 9 V DC transformer to power a 3 V DC motor?
No, not unless there is a 115-volt power inverter to convert the 12 VDC to AC at the higher voltage. There are inexpensive inverters available to plug into a cigarette lighter outlet in a 12V vehicle system, but only for up to about 150 watts.
What does it mean to source current?
the source current is the current that flows from the power source.
What is the continuous flow of charge in a circuit?
Most people say electrons (which are negatively charged). Some who are really out there might say it's a flow of holes moving the other direction.
Why FET called current controlled device?
BJT is a current controlled device because its output current is dependent upon the current in the base while for FET it is controlled by the voltage at the gate terminal of the transistor.
BJT is a current controlled device because its base current is not zero while for a FET the gate current is zero
Crystal diode for a p-type semiconductor and n-type semiconductor formation of the pn junction, in its interface on both sides of a space-charge layer, and has a self-built electric field. When there is no applied voltage, as pn junction on both sides of carrier concentration caused by the proliferation of poor self-built electric current and drift arising from the current equivalent and the balance of power in the state.
When the outside world a positive bias voltage, electric and outside the field of mutual self-suppression role of the Consumers carrier increase from the current spread of the forward current.
When the outside world a reverse bias voltage, external electric field and to further strengthen self-built electric field, in a certain form of reverse voltage and reverse bias voltage value unrelated to reverse saturated current I0.
When the reverse voltage applied to a certain high level, pn junction in the space charge of the electric field strength to achieve the critical values of the double-carrier process, a large amount of electronic hole right, had a great numerical breakdown of the reverse current, Breakdown phenomenon known as diodes.
How to calculate the wavelength?
This question is from Bohr's atomic model. The total length of the orbit is an integral multiple of the wavelength of an electron. The relation given by 2(pi)(radius)=n(wavelength), where n is the principal quantum number. Proof of this came later from De-Broglie's hypothesis,
(wavelength)=h/(linear momentum)
It is-
(wavelength)=h/mv .....I
From Bohr's model (Quantization of angular momentum),
mvr=nh/2(pi)
So,
2(pi)r=n(h/mv)
From I,
2(pi)r=n(wavelength)
What is the diode and Why it is used in electronic circuits?
A diode is basically a electronic non return valve it let current flow in one direction only and can not be used for amplification it only consist of a cathode and anode, where the transistor can be used in many applications, for instance as an amplifier, electronic switch, oscillator etc. it consist of three connections eg. Collector, Emitter and a Base normally the current is collected at the Collector and emitted at the Emitter and the Base is used to control the current flow with the Base at 0 volt no or very little current will flow between C and E it will only switch on with the B at about 2.7volt and the higher the B voltage the more current will flow thru the transistor
What jobs dose a battery do in the circuit?
The purpose of the battery in a circuit is to wive energy to the circuit
A junction is formed when two or more roads, pathways, or circuits meet or intersect. In the context of electrical circuits, a junction occurs where multiple components connect, allowing for the flow of current through various paths. Junctions are essential for directing traffic, both in transportation systems and electrical networks, facilitating movement and connectivity. The design and configuration of a junction can significantly impact efficiency and safety in both domains.
Why is RF amplification needed in a radio receiver?
In a typical radio receiver, there will be, a tuning stage, several IF stages, followed by an audio amplifier. (And a few other ancillary bits we'll ignore here.)
The signal from the aerial could be a microvolt or less, and the voltage required at the audio stage will be a few volts. It is not absolutely essential that any of the amplification take place in the tuning stage. Most of the amplification will take place in the Intermediate Frequency stages, and a little more in the audio stages.
What is the advantage of a reflex klystron over a two-cavity klystron?
What is probably the primary advantage of the reflex klystron over the two-cavity klystron is the mechanism used to tune the device. The two-cavity klystron has mechanical tuning, but the reflex klystron is tuned electrically. And it doesn't take an electrical engineering degree for an investigator to figure out that electrical controls can be manipulated a whole bunch faster than a mechanical device.
Why is FM superior immunity to noise?
FM systems are far better at rejecting noise than AM systems. Noise generally is spread uniformly across the spectrum (the so-called white noise, meaning wide spectrum). The amplitude of the noise varies randomly at these frequencies. The change in amplitude can actually modulate the signal and be picked up in the AM system. As a result, AM systems are very sensitive to random noise. An example might be ignition system noise in your car. Special filters need to be installed to keep the interference out of your car radio.
FM systems are inherently immune to random noise. In order for the noise to interfere, it would have to modulate the frequency somehow. But the noise is distributed uniformly in frequency and varies mostly in amplitude. As a result, there is virtually no interference picked up in the FM receiver. FM is sometimes called "static free, " referring to its superior immunity to random noise.
Basically, in transistor, the signal is transferred from low resistance circuit to the high resistance circuit. So it is called transfer+resistor=Transistor.
Transistors are widely used in different types of switching, amplifiers, oscillators and integrated circuits.
Based on the applications, the types of the transistors are as given below:
General purpose transistors, Low frequency transistors, High frequency transistors, Power transistors, Switching transistors, Field Effect Transistors, MOSFET, Uni-junction Transistors, Bi junction transistors, Photo transistor, High power transistors, Complementary pair, Darlington amplifier, Video and R.F. amplifier, Ultrahigh frequency and microwave, Insulated gate bipolar transistors, Static induction transistors.
More their to know about transistors are as given below:
History of invention, Time-line throughout, Basic construction, Bias arrangement, working, Various currents in transistors, Basic transistor amplifier, Configurations, Characteristics, Current gain and relation among them, D.C. load line, Operating point, Biasing of transistor, stability factor, specifications and ratings, testing, colour coding, identification of transistor using multimeter, h-parameter of transistor, particular applications etc...
What is the difference between limiting and clamping circuit?
A diode-clipping circuit is used to skip some portion of the signal (e.g. the half way/full way rectifiers rectify the '-ve' or '+ve' part of the signal).
A diode-clamping circuit is used to add some signals to the original signal.
- 1N is a code for one junction device
- 4001 is a partially arbitrary number assigned to help you find the datasheet for the part in the manufacturer's catalog quickly, 4001 is part of a series of related diodes (4001 to 4007) having similar characteristics except for PIV
What is the function of the ECC83 vacuum tube?
The ECC83 vacuum tube is more commonly sold as the 12AX7 and is a triode tube. This tube is used in a similar way that a modern transistor would be used in audio amplification applications. The ECC83 has a smaller size and a high gain at lower signal levels making it perfect for an audio pre-amp.
What is a sinusoidal wave?
This is a wave that appears to have curves. AC current/voltage. If you see a wave on a ossiloscope of what our AC (Alternating current) mains voltage that will be the answer to the question. DC (direct current) does not appear to have the same qualitys
What are the two transistor switches inside a CPU?
The two types of transistor switches inside a CPU are NMOS (n-channel metal-oxide-semiconductor) and PMOS (p-channel metal-oxide-semiconductor) transistors. NMOS transistors conduct when a positive voltage is applied to the gate, allowing current to flow from drain to source, while PMOS transistors conduct when a negative voltage is applied, allowing current to flow from source to drain. Together, these transistors form complementary pairs, enabling efficient logic operations and the construction of complex circuits such as gates and flip-flops within the CPU. This complementary technology is commonly referred to as CMOS (complementary metal-oxide-semiconductor).
What is the value of a resistor color coded red-violet-silver-gold?
Yellow is 4, Violet is 7, Violet is 7, Gold is 5% tolerence. 470,000,000 Ohms.
