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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 double precision value?

That usually refers to a floating-point number that is stored in 8 bytes, and has (in decimal) about 15 significant digits. In contrast, single-precision is stored in 4 bytes, and has only 6-7 significant digits.

What does the RIP hold-down timer do?

Instructs routers to ignore updates, for a specified time or event, about possible inaccessible routes.

What causes current to flow what makes it do this?

the basic cause of current flow is the movement of electrons ,basically when some potential difference is applied between any two terminal of a wire electrons will flow from low potential to higher potential because of the negative charge possessed by them , further rate of flow of chargei.e., electrons correspond to the electric current with respect to time.

What is the frequency of a police radio?

Basically it is a push to talk service.Where one can talk only(transmitter) and other are listen(receiver).When any one push the button then he only can talk.The range of this type of communication is 200-500 meter.Frequency range is 400-2700MHz. Frequency Range (UHF): - Channel 1, 400-420MHz - Channel 2, 430-450MHz ... Communication Range: 5KM+ .Push-to-talk cellular calls are half-duplex communications .Written by Kapil Sadhu.

How long is a microphone?

Microphones have been built shorter than a millimeter to longer than a meter, depending on application requirements.

What two things are needed to make a current flow in a circuit?

For the circuit to be connected all the way round because if there are breaks in the circuit the electricity will not flow back round. and number 2 a battery or a power source because without power where is the electricity coming from to be honest.

Hope it helped. Thanks. xx

What is the use of the control room in a substation?

Environmental and structural condition monitoring and protection is the use of the control room in a substation.

Specifically, a control room exists to make sure that the well-being of equipment, people and structures is realized. It may be the location for equipment which keeps a substation's ambient conditions -- such as air conditioning, heating, lighting, power -- respected. Its staff may have special expertise in maintaining the facility's security and structural integrity.

Is it possible to have the full load terminal voltage greater than the no load terminal voltage?

Not normally because the supply has a small resistance and very little reactance. Therefore the application of a load causes a voltage drop in the equivalent series resistance of the supply, so its voltage becomes slightly less.

A typical supply resistance can be taken from my home, which has a 240 v 60 amp supply, and the resistance is 0.1 ohms, so that a 10 amp load gives a drop of 1 volt.

Why small signal equivalent model is needed?

to calculate and measure the impedance ,admittance is simple

What is a substitute for a germanium diode?

There is no exact substitute for a germanium diode, except another germanium diode.

However if the only concern is to get a lower forward voltage drop than that of a silicon diode (0.7V), then a schottky barrier diode may be a suitable replacement as its forward voltage drop (<0.1V) is even lower than that of a germanium diode (0.2V).

How do you draw the circuit of excess 3 adder?

This is something that should only be done by a professional. Take it into a mechanic in order to avoid any issues.

A simple 2.80 m long pendulum oscillates in a location where g9.80ms2 how many complete oscillations dopes this pendulum make in 6 minutes?

Answering "A simple 2.80 m long pendulum oscillates in a location where g9.80ms2 how many complete oscillations dopes this pendulum make in 6 minutes

Why 400 Hz in Naval and Air applications?

At 400Hz all electrical equipment like alternators, transformers and electric motors become smaller to supply the same power than 50 or 60Hz equipment, they are using Bosh 90 amp auto alternators same size as BMW and Mercedes with some internal modifications that is capable of up to 8.4 Kw and 70 Volt 3 phase that is then inverted to 220 Volt with a transformer

What is the transformer turns ratio in terms of inductance of primary and secondary coil?

Turns-Ratio (TR) = Npri/Nsec Inductance-Ratio (LR) = (Npri/Nsec)^2 = (TR)^2 Turns ratio (TR) = (Npri/Nsec) Inductance ratio (LR) = (Lpri/Lsec) = (Npri/Nsec)^2 = TR^2 TR = SQRT[ Lpri/Lsec ]

Is it ok to hook a 16 ohm Speaker up to a 8 ohm amp?

A1: The output impedance of a power amplifier is always less than 0.1 ohms. There are no 8 ohm amplifiers on the market!

A2: I actually just bought a new car radio/CD player that specifically shows 4 ohm speakers on the sticker. It is designed to work optimally with 4 ohm speakers. If you use 8 ohm instead, it will work, but you will not get the full power output that is specified. The amp can only kick out so much voltage and so much amperage - if it is designed for 4 ohm speakers, and 200 watts (stereo, so 100 watts per speaker), it can supply 20 volts (P = V^2 / R). If you used 8 ohm speakers to this amplifier, each speaker would only get 50 watts powered at full output voltage.

Alternatively, if it is designed for 8 ohm speakers and 100 watts per speaker, it can provide 40 volts. If you used 4 ohm speakers instead, each speaker could be given 200 watts at 40 volts, resulting in severe overheating and damage to the amplifier.

This applies to your case as well: it is OK to hook up higher impedance speakers to a lower impedance amplifier, but you will get less power delivered. If you do the opposite (lower impedance speakers to higher impedance amplifier), keep the volume low or you could burn out the amp.

How do you determine form factor of sine wave?

Form factor of any periodic wave is [RMS CURRENT]/[AVERAGE CURRENT].

For sinusoidal wave

RMS current=I/sqrt(2);

AVERAGE current=2I/pi;

Therefore,

Form factor=[I/sqrt(2)]/[2I/pi]

=pi/{2*sqrt(2)}

=1.11

What is the maximum allowable resistance of a 680ohms resistor?

This depends on the tolerance rating of the resistor. There's 1, 2, 5, 10% tolerances. For tighter tolerances, you pay a premium - you can get tolerances as close as .1%. This is defined by one of the bands on the resistor. For a 10% tolerance, the maximum resistance of a 680 ohm resistor could be 748 ohms.

What is the Easily adjustable tuning component in a waveguide?

stub along with plunger is used for tuning... the answer is [stub ,plunger , screw]

iris can't be tuned easily

Method for minimising logic error?

BASICALLY, to minimise logic error, you need to stop being a tutti and be more of a kutha