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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 is piv requirement of a diode in the center tapped full wave rectifier?
peak inverse voltage of a center tapped full wave rectifier is 2V
where the maximum secondary voltage be V
Proof :- recall the diagram of the centre-tapped full wave rectifier ,during positive cycle the whole of the secondary voltage rests on the upper half of the transformer making D1 forward biased, but consider KVL in mesh D2 which is reverse biased so no current flows through it .
KVL is ,
VD=VR+VT
where VR is drop across resistor
and VT be the drop on the lower half of the transformer
sincs both are equal to V
we get.
VD=2V
Which is greater the breakdown voltage or the barrier potential?
Breakdown voltage is far greater than barrier potential.
silicon:-
break-down voltage :- 5v - 450 v
barrier potential ;- 0.5v to 0.7 V
What is a circuit that lights up even if one bulb is out?
A parallel circuit lights up even when one bulb is out.
How logic gates are working in digital watches?
If you have read How Pendulum Clocks Work, you know that all clocks (regardless of technology) have a few required components:
- A source of power to run the clock
In a pendulum clock, the weights or the springs handle this role.
- An accurate timebase that acts as the clock's heartbeat
In a pendulum clock, the pendulum and escapement handle this role.
- A way to gear down the timebase to extract different components of time (hours, minutes, seconds)
In a pendulum clock, gears serve this role.
- A way to display the time
In a pendulum clock, the hands and face serve this role.
A digital clock is no different. It simply handles these functions electronically rather than mechanically. So in a digital clock, there is an electrical power supply (either a battery or 120-volt AC power from the wall). There is an electronic timebase that "ticks" at some known and accurate rate. There is an electronic "gearing mechanism" of some sort -- generally a digital clock handles gearing with a component called a "counter." And there is a display, usually either LEDs (light emitting diodes) or an LCD (liquid crystal display).
Why is the voltmeter is placed across the load to be measured?
Because that is what you are trying to measure.
What is the basic difference between transistor as an amplifier and a step up transformer?
The output power of an amplifier is greater than its input power, whereas the output power of a transformer is almost the same as its input power. In other words, an amplifier increases acts to increase power, whereas a transformer only increases voltage.
What is a transducer in an analytical instrument?
Photoelectric or, more commonly, an ionization chamber
How do you identify capacitor's anode and cathod?
In ceramic capacitors if you observe it then one of its terminal is smaller than other one.Thus,the longest one is its anode and other one is its cathode.
The SIGNAL statement is used to clear the diagnostics area
Why ripple carry adder is used?
A ripple carry adder needs a much less complicated circuit, than other adder topologies.
What is the purpose of a radar synchronizer?
purpose of a radar synchronizer is to control timing throughout the system.
What is purpose of ram in 8051 micro controller?
the internal RAM is for data storage and for many applications is all that is needed.
Why classb is preferred over class c modulation?
That depends on the use. Each has advantages in different applications. Without more specifics on your application I cannot comment usefully.
Why does adding more appliances to a circuit increase the current?
More appliances means more load are being added, which necessariliy increases the current.
What is Zener resistance of the Zener diode?
zener resistance of a zener diode is the resistance of the zener diode
but which is the resistance of a diode
If pressure is constant and current increases the resistance?
I assume you meant pressure to voltage.
The resistance of a conductor is directly proportional to the temperature of the conductor. If the temperature of the conductor increases due to increased current, then the resistance tend to increase too.
What are advantages and disadvantages of full subtractor?
Advantage:1:To overcome half subtractor, full subtractor comes into play
What is definition of Programmable Logic Controller?
Programmable Logic Controller (PLC) is widely used in Industrial automation system. It has a power supply, memory, processor and input output cards. Field signal are connected to INput output devices
The quantum mechanical energy band where electrons reside in semiconductors that participate in interatomic bonding.
Why different frequencies has same average value and RMS value?
Voltage and frequency are independent quantities.
AnswerBecause the r.m.s. value is dependent on the shape of the waveform, not its frequency. The average value of any symmetrical waveform is zero and is independent of frequency.
How does keyphasor probe work?
A Keyphasor signal is a once-per-turn or multiple-event-per-turn pulse from a rotating shaft or gear used to provide a precise timing measurement.
The module receives input signals from proximity probes or magnetic pickups and
converts the signals to digital Keyphasor signals that indicate when the
Keyphasor mark on the shaft coincides with the Keyphasor transducer. T
What is radiation pattern for an antenna?
Radiation pattern is just a map of how the strength of the signal varies around (transmitting) antennas.
For some, like a simple whip antenna, the patttern too is quite simple. For directional antennas they can be quite complicated.
