Electronics Engineering

Electronic devices works on low level dc voltage like 48volts and less than that. We cannot give direct line supply to electronic devices, for this transformer is used to convert ac voltage to required dc level...

Whereas in electric devices we can use direct line supply (110V/220V) ac. These devices can also be operates on dc volts but greater than 48volts

It is generally accepted to be approximately .7 volts.

High voltage and low resistance would cause high amps. E = I R or I = E/R. PS E would be electromotive force measured in volts. R would be resistance measured in ohms. I would be current flow measured in amps.

Mega is 8 X 10^6 and Kilo is 8000 X 10^3.

For every 3 you go down in powers you divide by 1000, so 8 Mega ohms is 8,000,000 ohms. 8,000 Kilo ohms or 0.008 Giga ohms.

A: it must apply to AC since there is no phase in DC. Since AC is a complete circle 0-360 degrees the principle if to conduct current at a degree of the circle. And AC has both positive 0 to 180 and negative 180 to 360 polarity it is possible to control output power by conducting current only at certain angle of the circle . The phase angle is to differentiate the conducting current in which quadrant of the circle

A: If the transformer is connected to a power input of course it will draw current. The primary is a long wire it has own resistance wrap around an iron core. Of course there will be primary current whether there is a load on the secondary or not.

pres CTRL+J at the gate and if you are in the correct type of plane for that gate. Some free downloadable aircraft are not recognised by the jetway system and will not respond.

effective height of half wave dipole antenna

Assuming "quoted value" to be RMS value, or average, [what you would see on a meter], the peak would be that value times 1.414. Going backward, peak times .707 is RMS.

A: A transformer will transform the AC input to a low or hi output as required by a ratio of input to output. The power will be expressed a KVA or kilo volts to ampere ratio. It also will have a rating of maximum voltage for the simple reason of winding to winding insulation and primary to secondary isolation because if breakdown occurs the transformer will burn out promptly.

The speed control of the DC motor is important because its speed can be changed over a wide variety of simple methods which is not possible in an AC motor.

A: It is any system where there is negative feedback to control its behavior

A: A VOM digital requires to have a ADC analogue to digital converter whereby the analogue input will be displayed as number representation. An analogue meter all it requires is to have is current flow through it.

A: Motherboards and even cards have lines running in all kinds of way in close proximity. a continuity tester not only checks for continuity but also for shorts to one point to every point on the item submitted

The parallel-tuned filter in antenna circuit rejects only the undesired frequencies.

A: It is like an analog tachometer it reads RPM or speed and display in Numbers on a read out. You can find the application on airplanes and your car except it is an analogue instrument. I built one once for my car the read the RPM it was totally unsatisfactory because of the car inherited noise and on a 3 digit readout the least significant number was totally useless. The noise It can be clean out with filters then again the read out will be slow but on a car where the speed changes continuously analogue is proven Superior and most people don't care it it is 100 RPM or 101

Lots of things can be amplifiers. They can be as simple as a single transistor.

Picking an amplifier requires a bit of system knowledge. What's the signal to be amplified? What is the output delivered to? Should the "DC" bias levels be decoupled?

Here's an example: An audio amplifier is typically a voltage-in, power-out device. So, the input should have high impedance, while the output has low impedance. The device should be powerful enough to handle large currents and power levels.

A radio-frequency amplifier is typically power-in, power-out (with impedances matched to 50 Ohms to avoid signal reflection).

A typical blood glucose sensor typically has a current output. So, connecting it to a microcontroller and displaying the result would require a current-to-voltage amplifier.

For most of these applications, it is possible to adapt an operational amplifier to create the desired amplification (trans-impedance, trans-conductance, etc.). Sometimes, when higher performance is required, it's necessary to build a circuit using OTA's (operational transconductance amplifiers) and transistors (common-source, common-emitter, common-base, mirrors, folded cascodes, etc). It's usually easier to find a special-purpose one to buy (e.g., buy an audio amp, or a RF amp, or an instrumentation amp, etc from Digikey).

Hope this helps!

A: There are so Manny IC that is best if you learn how to research on your own at datasheetlocator,com

Internal friction created because the electrons hit the various metal's latices or atoms.

Higher the temperature more movements so the possibility of hitting is higher so more resistance to flow

Power factor does not apply to a resistive circuit. Just the current will follow the voltage (in phase)

Power switch

It depends on the the number of cores, type of insulation, whether armoured or unarmoured, and method of installation. So, there is no simple answer. You must determine the current-carrying capacity from the Tables provided in BS 7671:2008 Requirements for Electrical Installations, or the equivalent used in your country.

A radar mast is a high platform to mount a radar antenna such as the radar has an unobstructed view.

how calcualte conductivity