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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
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The max amount of voltage the diode can block from going into the circuit backwards.
This is a particular transistor amplifier configuration. In general, the input signal is applied to the base, the collector is connected to a supply voltage, and the output is taken between the emitter and power supply common.
One of the characteristics of the emitter follower is the output voltage "follows" the input, but the output is reduced by the Vbe voltage (the voltage drop between base and emitter, approximately 0.7 V for a silicon bipolar transistor).
What do you mean by series voltage regulator vs shunt voltage regulator?
wala... secret
In general the difference between series and shunt (or parallel) is that series is like a string of pearls, each one receives from a leading source and sends directly to a draining target (the current has to flow equally through all).
Parallel however is like a railroad track in that the source is one rail and the drain is the other rail with each of the ties pulling from one and pushing into the other regardless of what any of the other "ties" are doing (each has a completely separate current flow from the others).
In terms of regulation a series regulator would have to "block" some of the power going through it to the load in order to regulate it. A shunt or parallel regulator would have to "drop" or waste enough of the limited available power to restrict what would be left available to the load (or loads).
Hope this overview helps
Is the ampere a unit of quantity or a unit of rate?
Nowadays, the ampere is considered the fundamental unit, and the coulomb is the derived unit. In other words, the coulomb is the amount of charge delivered in one second by a current of one ampere.
AnswerThe coulomb has never ever been considered a Base Unit in either the SI or earlier metric systems. The ampere has always been considered a Base Unit. Prior to 1948, the ampere was defined in terms of its chemical effect; after 1948 it was defined in terms of its magnetic effect -i.e. in terms of the force between two, parallel, current-carrying conductors. So, the ampere has never been defined as an unit of rate. On the contrary, the coulomb is a Derived Unit, based on the ampere and the second.What is the Working principle of auto transformer?
An autotransformer (sometimes called autoformer)[1] is an electrical transformer with only one winding. The winding has at least three electrical connection points called taps. The voltage source and the load are each connected to two taps. One tap at the end of the winding is a common connection to both circuits (source and load). Each tap corresponds to a different source or load voltage. In an autotransformer a portion of the same winding acts as part of both the primary and secondary winding. Operation he ratio of secondary to primary voltages is equal to the ratio of the number of turns of the winding they connect to. For example, connecting at the middle and bottom of the autotransformer will halve the voltage. Depending on the application, that portion of the winding used solely in the higher-voltage (lower current) portion may be wound with wire of a smaller gauge, though the entire winding is directly connected.
Why gain increases in low frequency region in BJT?
Because Beta (current gain) in a transistor is inversely proportional to frequency.
Hence it increases as frequency decreases.
Also the ac voltage gain is directly proportional to Beta.
Sorry. You fail CompSci. Try again, idiot.
^^ Sorry, you fail at being a decent human being.
the ' after the x is indicating that the x is negated, and is read as "not x". when two letters are beside each other, this indicates that they are ANDed together. The first term is therefore not x and y. Put differently, the term is true only if x is false and y is true. The second term is simply an and. It is true when x is true and A is true.
What is the name for the unbroken path that current follows?
That would be called a 'circuit' or 'closed circuit'.
How is a Load applied to a ac generator?
The load conductor is connected to the load side of the generator breaker. Once the generator is up to speed the load breaker is closed and the voltage is then applied to the load.
When was the national grid set up?
The answer to this question will depend very much on which country the question is asking about?
How do you measure milliamps with multimeter?
very CAREFULLY You must start at the high level and step down. otherwise permanent damages to the meter will be evident.
Types of images in digital image processing?
four typesof images are there-
binary,grayscale,indexed and truecolor
Can full wave rectification be done by two diodes?
Yes, if the transformer secondary is centertapped.
How RC coupled oscillator is phase shift osillator?
The resistor allows a slow charge to enter the capacitor. When this charge reaches a certain point the circuit activates and forces the capacitor to discharge. Once discharged the circuit reverses itself and starts the charge over again. The larger the cap and/or resistor the lower the frequency because it takes longer to charge the cap.
What is deflection sensitivity of a cathode ray oscilloscope?
Depends on the design of the 'scope and it's "X" & "Y" deflection amplifiers.
How do you calculate full load for 500amp welding machine?
You need the input voltage and maximum input current specs found on the name plate.
How does an microstrip patch antenna radiates?
The source of radiation for rectangular microstrip radiator is the electric field that is excited between the edges of microstrip element and the ground plane.The fields are excited 180 degree out of phase between opposite edges.Each edge therefore radiates an omnidirectional pattern into half space above the ground plane.The opposing edges are excited out of phase but their radiation adds in phase normal to the element.
For more details see Antenna Engineering handbook by Johnson and Jasik.
Thanks.
Is The current in a circuit directly proportional to the impressed amperage?
I'm not sure what you are meaning by "impressed amperage", but current is measured in amperes (thus amperage), so I would say you're probably referring to the same thing (an apple = an apple kind of statement).
Calculate the energy per photon of radio waves of frequency 107.3 MHz?
E = hf
The energy per photon is equal to Planck's constant times the frequency, in this case 6.62606957×10−34 x 107.3x106
Circuit diagram of IR TV remote control using 8051 microcontroller also explain its working?
the 8051 is a micro controller
the buttons tell the 8051 to do something
there is an ir led on an output bit of the 8051 that shines on the tv ir detector
it pulses a code the tv knows
or window fan, ac , vcr, dvd
the other output bits are used to scan multiple buttons
like the difference between a rotary and touch tone Phone
ive seen them with tms1000 and z8
thermostats may have 68hc11 it has 8 channel a/d right on it
circuit diagram is very trivial its all in how you pulse the led
Datasheet:
http://www.national.com/ds/LP/LP2950.pdf
...is no really a transistor, is a micro-power voltage regulator. "CZ3.3" means 3.3 volts, 2950 is the model. According with the datasheet, replace it with a LP2950CZ-3.3
...the funny looking "N" is the logo of National Semiconductors ;)
