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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
What are the danger signals of overexercise?
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How do you calculate total power in parallel?
Either (1) determine the power of each branch, and add them together, or (2) multiply the load current by the supply voltage.
How image frequency affect in mixer?
The process of multiplting two time domain signals generates signals at sum and difference frequencies (where the IF is the difference frequency). This implies that any signal whose frequency differs from the LO by the same amount that the RF does, will also impose its self on the same IF. E.G. if RF = LO - IF, then the signal at LO + IF will also downconvert and apear at IF. This signal (in this case LO + IF) is called the image frequency IM. and must be attenuated (perhaps by an image rejection filter) prior to mixing.
Where the example above applies to high-side LO injection (LO > RF) the same is true for low-side LO injection (LO < RF).
What material could you use to make a model?
fiber glass, wood card Bord tooth picks or ice block sticks these are only some of the materials
Why can metals conduct electricity but remain unchanged?
Only the free valence electrons forming the electron "gas" move and as many move in as move out. Only metals form this electron "gas".
You should study up on Kirchov's Current Law (KCL). It is the means of answering your question and a tool for understanding all parallel circuit configurations.
AnswerKirchhoff's current law will tell you that the supply current is equal to the sum of the branch currents.
Why three amplifiers are used in Tuned radio frequency receiver?
There are more than three amplifiers in a typical radio receiver.
If, however, you are asking why there are three "stages" in the IF section, then the reason is that the IF section of a typical superhetrodyne receiver needs more bandwidth than can normally be provided by a single stage. As a result, there are usually three stages, each tuned slightly apart, so that you get a reasonable bandpass - otherwise, the demodulated signal will suffer.
Does a Digital Voltmeter have a high or low input impedance?
Digital voltmeter has high input impedence.
How do you produce a current in a circuit without a voltage source?
A: mathematically speaking at zero potential with an infinite current source there should be current. PARADOX go around the world except go half way stop divide the distance and so forth mathematically there is going to be no end to the travel.
ANSWER: Current will only flow if it find a path to flow. POTENTIAL for volts can exist without current flow. As soon as we try to measure it current will flow.
How do you use kirchhoff's voltage rule in complex circuits?
You apply the rule to each loop in the circuit individually, and each loop produces
a separate equation. You solve the collection of equations for the individual loop
currents.
How do you work out amps of current from 230V connected to 534 ohm resister?
you divide the volts by the ohms
What could be the causes of intermittent output signal of audio amplifier?
Any number of things can cause intermittent output, but the most common are bad solder joints or bad sockets, bad switches or controls in the signal path, or, much less frequently, a broken capacitor or resistor that is letting moisture in. Examine solder joints and sockets on power components first; the heat cycles that output transistors and power supply components go through will put more mechanical strain on the device. It can be very useful to use a 10x magnifier to examine solder joints. Switches and controls can be cleaned with tuner cleaner or contact cleaner, available in a spray can from nearly any electronic supply store.
Can you jump start a 6 volt car with a 12 volt battery?
Yes, but you may damage some of the electronics.
What is the longest radio wave?
The longest radio wave would be the one with the lowest frequency. Wavelength is all about how far through space the leading edge of a wave travels before the "trailing edge" of one cycle of it leaves the broadcast antenna. For a frequency of 1 cycle per second (CPS), or 1 Hertz (Hz), that wavelength is almost 300,000 kilometers, or about 186,000 miles. That's a really, really long wavelength. You might be saying something about a frequency of 1/2 cycle per second or something like that. The wavelength will be double what it was for the 1 Hertz wave, of course. And for 1/4 cycle per second, it will be 4 times what it was for that 1 Hertz wave. There may not be a lower limit for frequency (or an upper limit for wavelength, which is the same thing), but there are practical limitations for what we can broadcast and what we can receive using current technology.
What is mean by RF transmitter?
RF means Radio Frequency. This did mean broadcast radio/TV or at least some high powered transmitter in the past, but today could apply to many lower powered applications, down to WiFi and Bluetooth.
Quadrillion may mean either of the two numbers (depends on long and short scales):
- 1,000,000,000,000,000 (one thousand million million; 1015; SI prefix peta) - increasingly common meaning in English language usage.
- 1,000,000,000,000,000,000,000,000 (1024; SI prefix yotta) - increasingly rare meaning in English language usage.
It is 1,000,000,000,000,000.
- Simply put, in the English language, it is "one thousand trillion."
What are the two main types of uninterruptible power supplies?
stand by: battery powered circuit is used when AC input fails
inline device: battery powered circuit is used continually
Verified :"Inline & standby" . A+ test answer 19 June 2011.
What features of the ASK signal suggests that it's an AM signal?
Just the amplitude change, while the frequency and phase still remain
Is there a map available showing the major high voltage transmission lines in California?
Possibly, but due to the heightened level of security for public works in the US since 9/11, it is unlikely that such would be available to the general public.
On a toaster which switch opens and closes the circuit?
There is a main switch to turn it on and off which, on some makes of toaster, is operated when the bread-carrier tray is moved into the "toasting" position. On some other makes of toaster the main switch is operated when the toast color control is operated, usually by turning a knob or sliding a slider.
Depending on the make of toaster this "browning level" control either sets a particular "toasting time" or a particular "color". In either case, when the toast is done - meaning when the temperature has reached the manually-set point - a thermal switch shuts off the current to help prevent the toast from burning.
For safety reasons, to help prevent starting house fires, on modern toasters there is also a second, high-temperature, thermal switch. This is designed to shut off the current if the temperature gets so hot that the toaster could burn not only the toast but also nearby surfaces such as the worktop or table it is standing on, a wooden cupboard, curtain, etc. Can't have toaster heating up the room!
How often the ripple occurs i.e. times the ripple occurs per second. The ripple should be a repeating pattern. Figure out where the ripple repeats and measure how long each repetition takes. Measure this in seconds. The frequency is 1/Time where time is the time measured previously.
