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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
How do you find conductance using ohms law?
To find the conductance using ohms law,you take the inverse of the resistance(/R)
The function of an oscillator in a radio transmitter is to?
There are typically at least two oscillators involved in the transmission aspect of a radio transceiver: one is the transmission oscillator which creates a cosine waveform modified with the input key (the information being broadcasted), the other is the variable frequency oscillator which allows one to select the desired frequency for communication. On most transceivers the VFO also modifies the receiving end of the device simultaneously.
When electric circuit is closed no current flow through it IS the statement is correct?
yes... this is possible if a diode i connected in reverse bias with a battery and a resistor for example. A diode in reverse bias means its anode will be connected to positive terminal of the battery and its cathode to the negative terminal of the battery. In such a case, minimal current flows through the circuit which can be neglected.
Different types of diodes and their applications in real life?
what are the different types of diodes and their appplications
Why don't we draw out the Circuit diagram all the time?
Because the components are much more detailed and difficult to draw in real life
What is the purpose for finding temperature coefficient of resistance?
to investigate change in resistance as temperature is varied
What does I x V equals R stands for?
Nothing. If I is current, V is voltage, and R is resistance, then V=I*R and V*I=P, where P is power.
What is the Difference between pulsed and digital signal?
pulsed is like a beating heart while digital is your face
What is a surge suppressor varistor?
A varistor is an electronic component used for surge suppression. It is also known as a voltage dependent resistor, but it acts more like two zener diodes reversed and placed in parallel. The majority of surge suppression devices use these. However, they don't work all that well for lightning strikes.
Why wouldn't you connect all of the loads in a household circuit in a series?
whenever you think of a series connection think about diwali/christmas lights(although now days even they come in 2 sets of series connection) ...
There are many reasons to why all loads are not connected in series:
No.1)If one appliance would stop working the circuit would break and no other appliance would work(what happens when 1 bulb fuses in diwali/christmas lights?...the whole thing stops working)
No.2)We would not be able to individually control the appliances and there would be no option but to have them all on simultaneously
No.3)All appliance receive same amount of elect. current whereas different appliances require different amounts of current
No.4)All appliances will receive diff voltage whereas every house receives same voltage(240 volts in India)
When measuring current you are measuring the number of?
When measuring current, we are measuring the number of electrons (conventionally positive charges) passing through the cross section of the conductor in one second.
AnswerActually, the unit of electric current, the ampere, is defined in terms of the force between two parallel current-carrying conductors, and NOT in terms of the quantity of electrons passing a given point!
Every bulb has a code to it. MR16 is short for Multifaceted Reflector with a 16/8" (16 x 1/8) diameter.... or 2".
A standard incandescent bulb is an A19 (don't ask me what that code stands for... A is the shape, 19 is...??)
Can you measure resistance while checking for continuity?
A: Checking continuity is the same as checking resistance, therefore yes someone can determine the resistance at that particular current level
If a magnet is held close to a coil of wire will it cause current to flow?
Yes, but only if the magnet or the wire are kept moving.
The OR gate can be converted to the NAND function by adding which gate to the input of the OR gate?
NOT Gate
What parts are used in inverters?
MAJOR COMPONENTS OF AN INVERTER
An inverter design and components vary with requirements but following components are most commonly used in designing an inverter.
1. MICROCONTROLLER
Microcontroller is the main and integral part of an inverter. The main working of microcontroller is to control the switching of signals according to the requirements.
A single microcontroller can perform multiple functions (e.g.) generating PWM for switching, controlling the protection systems etc.
There are various types and families of microcontrollers available in the market, for example :
PIC family
AVRs (ATMEGA series)
Atmel
Arduino
FPga (etc)
Depending on the design specifications, any microcontroller can be used.
2. BIPOLAR JUNCTION TRANSISTORS (BJTS)
BJT or a bipolar junction transistor is a three layered device which is capable of controlling the current flow.
In a BJT, a small current at the input of the device can control larger currents at the output. Thus, BJTs can amplify currents.
They can be used as a relay driver, as a switch, as a constant current source, as an amplifier (etc.).
3. H-BRIDGE
H -bridge is a topology in which four switching devices BJTs, MOSFETs or IGBTs are integrated together in a single circuit.
The name H-Bridge is given to it because of the typical arrangement of this circuit.
Mainly used switching devices in the H-bridge circuits are BJTs, MOSFETs or IGBTs.
4. MOSFETS
The Metal-Oxide-Semiconductor-Field-Effect-Transistor (MOSFET) is a voltage controlled device and requires a very small input current.
It is mainly used for switching of electronic signals as its switching speed is very high.
It is the most commonly used FET in low-power high-frequency circuits.
The MOSFET is composed of a channel of n-type or p-type semiconductor material, and is accordingly called an N-MOSFET or a P-MOSFET.
5. FILTERS
At times it is desirable to have circuits capable of selectively filtering one frequency or range of frequencies out of a mix of different frequencies in a circuit.
A circuit designed to perform this frequency selection is called a filter circuit.
The FM receiver is tuned 98.3 mhz if 10.7 mhz local oscillator frequency is?
The question probably should be, "If the FM receiver is tuned to 98.3MHz and the IF (intermediate frequency) is 10.7MHz, then what frequency is the local oscillator running at?"
The answer would be 87.6MHz but i could be 109MHz and would still work. The local oscillator is mixed with the received signal and what comes out contains both the sum and the difference of the two frequencies.
The amplifiers that follow are highly tuned to the IF and so only that frequency is amplified and demodulated by the receiver.
What is mean by stability of the oscillator?
Stability of the oscillator means the how much frequency stability it have. Measure of frequency stability comes from "rate of change of phase w.r.t frequency", the more it is the more stable the oscillator is, because we know that one condition for oscillation is that the loop gain phase shift should be zero, hence if due to ckt. parameters there is some change in phase then by very little variations in frequency we can bring back the loop gain phase shift to zero. ex. is LC tank circuit which act as an osciilator at resonant frequency. Frequency stability can also be measure from quality factor, the higher it is the more stable ckt. is,
Parikshit Parasher
B-tech ECE, PG power engg.
parikshit_parasher@yahoo.co.in
What size inverter do you need to go from ac to dc for a Kenmore model 16562 chest freezer?
A: It not size but rather capacity. the capacity will be the ac power consumption AC volts X AC current that will get Watts. So the capacity of the inverter should be the same watts plus a safety and efficiency power if the watts is 100 watts i would buy a 125 watts minimum
What is the difference between line voltage and low voltage?
Volumetric Imaging and Processing of Integrated Radar
It is actually a software that processes the data collected by a radar unit.
How do you Describe the meter readings if a diode is bad?
A: A very low reading in both direction will indicate a shorted diode. A meter is an indicator not a tester keep that in mind
