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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
Why current and voltage are not equal?
Current means flow of electrons
Whereas the difference between two points is the voltage difference.
Example: when you hold a filled jug of water at a certain height, it is the voltage. Because there is some difference of water at you end and the ground.
But when you start pouring the water from the jug, water will fall on the ground which can be said a current.
What metal stops cell phone signals?
Cryptonite Stop All Things Including Superman And His Pet Superdog Mr Cuddles
A 9 V battery is hooked in series with two resistors R1 75 and R2 100?
You'll get a reading on the ammeter showing 15 mA
Most transistors and diodes exhibit reverse bias leakage.
4-20ma is a type of signal transmission.
- A process value, such as pressure, RPM, or whatever, is converted into a current in the range of 4ma to 20ma and sent out on a twisted pair cable.
- The receiver passes the current through a resistor, converting it back to voltage, and processes it accordingly. If that resistor were 250 ohms, the voltage would be 1-5v.
- An offset of 4ma is used so that the receiver can detect an open connection.
- The ground or power reference is usually maintained at the transmitter, but sometimes it is at the receiver.
- A twisted pair cable is used so that the effect of common mode noise is minimized.
- The receiver is usually an opamp so that the effect of common mode voltage is minimized.
What are the electronic devices that are used in electronic design?
- Oscilloscope
- Logic Analyzer
- Microprocessor debug emulator (if microprocessor is used)
- additional standard misc. electronic troubleshooting tools
What is the advantage of darlington transistor to an ordinary bipolar junction transistor?
higher current handling / heat dissipation This is not really true as those are not singular characteristics of darlingtons. The major characteristics of a darlington is high gain, typically ranging from over 100 to 1000. And since there are essentially two transistors in the case of a darlington and the base of a darlington is connected to the base of the first transistor whose emitter is connected to the base of the second (power or output) transistor, the forward voltage drop from the base to the emitter of the darlington is approximately 2 times the forward voltage drop of a single transistor. it is a beta multiplier therefore it has higher emitter current capability and it not a hi gain per say just higher current capability as opposed to a regular transistor. usage is for an emitter follower which has no voltgage gain at all.
High frequency response
A PRI (Primary Rate Interface) is a telecommunication standard used in the Integrated Services Digital Network or ISDN, for carrying multiple DS0 voice and data transmissions between two physical locations. PRI was developed specifically for industrial or large quantity users. PRI is an industrial ISDN line while the Basic Rate Interface, or BRI, is used to cater to home and small enterprises.
Both Primary Rate Interface and Basic Rate Interface are made up of a number of B channels and D channels. B Channel or the Bearer Channel is used for data transmission, including voice, and D channel is meant for signaling and control. A PRI is made up of 23 B-channels and one 64 Kbps D-channel in a T-1 configuration and 30 B-channels and 1 D-channel using an E1 line.
The T-carrier system is standard in Japan, US and Canada, while E1 is popular across Europe and Australia. In other words, in North America and Japan PRI is represented as 23B+D with a total bit rate of 1.544 Mbit/s (T1) while it is 30B+D in Australia and Europe, which is equivalent to a bit rate of 2.048 Mbit/s (E1). The Primary Rate Interface makes use of the Q.931 protocol over the D channel.
A PRI is typically used to establish communication between a PBX, or a private branch exchange, which is a telephone exchange operated by the customer of a telephone company, and a Central Office of the telephone company or an Inter Exchange Carrier or IXC, a long distance telephone company. The advantage of primary rate interface or PRI is that the 23 or 30 B channels can be used in various combinations for specific data transmission needs, such as a videoconferencing, allowing bulk data transfer to be achieved more flexibly.
the flowing in the conductor is related as given by the relation...
I=Vena
v=drift velocity of electron
e=charge on electron
n=concentration of electron in the current carrying conductor .
a=area
What factors can negatively affect a radio signal with a frequency of 200 KHz?
Electricity, Heat, Natural obstacles during daylight hours
How long will a 4 watt solar charger take to put 1 amp into a caravan battery?
A very, very, long time with direct sunlight. Charge your battery with a battery charger
Who are the famous scientists in electronic and telecommunication field?
Alessandro Guiseppe Antonio Anastasio Volta
André-Marie Ampére
James Prescott Joule
Georg Simon Ohm
Charles William Siemens
Charles-Augustin Coulomb
Michael Faraday
Joseph Henry
Nicola Tesla
Wilhelm Eduard Weber
Heinrich Rudolf Hertz
Guglielmo Marconi
Gustav Robert Kirchhoff
Léon Charles Théveinin
Edward Lawry Norton
Why is RC coupling very popular?
Resistors and capacitors are a lot cheaper and lightweight than transformers
When a capacitor is charged after 1 time constant the v across the capacitor is?
Depending on the circuit, 63% of the available voltage.
Without the actual schematic of the device to examine any answers given would be worthless random speculation. All component values and their exact connections must be known to analyze an electronic circuit correctly and if it contains any custom ICs even that is useless as it is unlikely that the function and operation of the ICs can be determined.
A: A holder is a socket whereby sensitive IC can be stored foe safe keeping
Can you use 120 W speaker 8 ohms for 200 W amplifier?
Yes, but you will only be able to produce 120 W of power before you overdrive the speaker.
What is the use of AT89S52 in DTMF based industrial aplliances control system?
AT89S52 is a microcontroller based on the Intel 8051 architecture and features. Concerning your question, AT89S52 is the heart of most project involving Dual Tone Multi Frequency (DTMF), that is to say it is the controller IC used in such project.
What is verector diode in electronics?
I think you you are asking about varactor diode. varactor means variable capacitor. varactor diode is a p-n junction diode which provide a capacitance across it subjected to applied forward and reverse bias.
means it provide variable capacitance which depends on the applied reverse voltage(mostly varactor diode works on reverse voltage).They are also known as varicap
