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50 ohm is a great compromise between power handling and low loss,for air-dielectric coax..
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What is the advantages of buffer circuits in digital electronics?
buffer circuits helpful in overcoming the impedance matching problem.for example if we want to send a signal from one devise to other ,if there is no impedance matching between this two then signal is not transfered.now if we use buffer in between these two devises then the buffer without changing the signal shape or value it simply transffers the signal
Why do not you use impedance in DC circuit?
Actually, its a matter of terminology... Impedance can be used in a DC circuit. We just call it resistance, however, transient analysis would imply a different notation. To be clear, impedance is normally used in AC circuits, and it is the electrical opposition to AC, taking into account not only voltage, but phase angle. In a DC circuit, impedance and resistance are the same thing, simply with a phase angle of zero.
What is the difference between characteristic impedance and intrinsic impedance?
I believe intrinsic impedance is more tied to the medium, thus is defined in terms of magnetic and electric permeability and electrical conductivity, while characteristic impedance is a "wider" look at the impedance. For example, you can calculate the intrinsic impedance of a 18 awg copper wire, or air, or a vacuum. If you wanted to use coax cable with an 18 awg core, you would be looking at the characteristic impedance, not the intrinsic impedance of the copper that will be carrying the waveform.
The modern digital systems use the integrated circuits?
The modern devices that use integrated circuits are :Lab topsDVDsProcessorsPhonesAlmost anything containing electronics.
Why do you not use metal ladders while working on electric circuits?
shock risk
Does leaving in a microwave plugged in use electricity?
Generally, yes. You are powering the clock and probably the timer circuits.
Advantages of negative feedback amplifier?
Most practical amplifier circuits use negative feedback for the following practical benefits: Stabilization of voltage gain, decreasing output impedance, increasing input impedance, decreasing distortion, increasing bandwidth.
What is the advantages of buffer circuits in digital electronics?
buffer circuits helpful in overcoming the impedance matching problem.for example if we want to send a signal from one devise to other ,if there is no impedance matching between this two then signal is not transfered.now if we use buffer in between these two devises then the buffer without changing the signal shape or value it simply transffers the signal
What is the use of series and parallel resonance?
Series resonant circuits have their lowest impedance at the resonant frequency. Parallel resonant circuits have their highest impedance at the resonant frequency. This characteristic is exploited in the design of filters, oscillators and other circuits.
Why is microwave circuit design often considered 'more of a plumbing job than a wiring job'?
Because microwave circuits in waveguide use hollow waveguide sections with flanges to bolt them together.
Can you safely use a 15 amp circuit for a microwave rated at 12 amps?
Yes, the microwave draws less that the circuits protective rating and will not trip the breaker if used on a 15 amp circuit.
Why do not you use impedance in DC circuit?
Actually, its a matter of terminology... Impedance can be used in a DC circuit. We just call it resistance, however, transient analysis would imply a different notation. To be clear, impedance is normally used in AC circuits, and it is the electrical opposition to AC, taking into account not only voltage, but phase angle. In a DC circuit, impedance and resistance are the same thing, simply with a phase angle of zero.
What is apparent impedance of a motor?
commonly for motors we use 20% impedance..
Which is better high input impedance or low input impedance and why?
That depends on the output impedance. In electronic we use voltage bridging, that is a relative low output impedance to a higher input impedance. Usualy the input impedance is more than ten times higher then the output impedance. An input impedance is called also a load impedance or an external impedance. An output impedance is called also a source impedance or an internal impedance.
What are the importance of impedance matching in amplifiers?
Two reasons. 1...When impedance of source and destination match, power transfer is maximum. 2...If a long transmission line is involved, the characteristic impedance of the line must match the destination impedance, or reflections will occur on the line.
What is admittance why it used in electrical?
Admittance is the reciprocal of impedance (1/Z) and is the vector sum of conductance (1/R) and susceptance (1/X). Admittance is used in solving parallel alternating-current circuits, because it avoids the need to vectorially add or subtract reciprocals, which would be the case if we were to use impedance, resistance, and reactance.
Input impedance is greater than to load impedance?
In electronic gears we use voltage bridging, that is a relative low output impedance to a higher input impedance. Usualy the input impedance is more than ten times higher then the output impedance.An input impedance is called also a load impedance or an external impedance.An output impedance is called also a source impedance or an internal impedance.
