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as it acts ideally as open circuit for dc
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∙ 14y ago
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Are junction capacitance and transition capacitance the same?
Junction capacitance is used to take the ripple out of DC circuits primarily. The other is used in voltage doublers or step ups as a storage.
Which circuit element is used to block DC in an electronic circuit?
Capacitance will block DC
What is the labeling nomenclature for capacitors and how is it used to identify and select capacitors?
Capacitors are marked with the capacitance and the maximum working voltage. The action of a capacitor is store charge short-term and a capacitor is commonly used as a reservoir of charge in a rectifier circuit to smooth the dc output voltage. Other uses in electronic circuits are as a dc-blocker which passes an ac signal while not passing the dc bias, or as a decoupling capacitor in dc circuits to remove any ac signals present while preserving the dc voltage, or in timing circuits because the time-constant of a resistor and a capacitor connected together is CR, or in filters and tuned circuits. Sometimes a variable capacitor is used, connected to a control knob for tuning a radio. In each of the above applications there are accurate methods to decide exactly how much capacitance is required.
Why auto transformers are not used directly on dc circuits?
Transformers are not used on DC circuits because they rely on a varying magnetic field to transform power.
What is a tuning capacitor?
A capacitor whose capacitance is variable (within some range). They are usually used to adjust resonant circuits or delay circuits.
What is tuning capacitor?
A capacitor whose capacitance is variable (within some range). They are usually used to adjust resonant circuits or delay circuits.
Why chokes are used in electrical circuits?
commonly with a single dc power source to isolate ac loads from other parts of the circuits. in dc power supplies to remove ripple
Why does the concept of stray capacitance came into electronic circuits?
Any two objects that occupy the same universe have capacitance between them. In electronic circuits components are quite close to each other, and this capacitance is often a nuisance, causing cross-talk, instability, and signal losses.
What happen to the apparent power if the DC excitation is reduced?
'Apparent power' is a term used in a.c. circuits, NOT d.c. circuits.
Does an SCR work on DC or ac?
SCR's are mainly used in AC circuits. They could be used in DC circuits but they then would not be able to turn off. They require the zero crossing of the AC circuit to turn off. Then when positively biased they can be turned back on.
Why capacitor is used in between the bias circuit?
Capacitor is used in biasing circuits to block the passage of DC signals.
Why does Jim use dc supply in oscillator circuits?
Jim use dc supply in oscillator circuits to and ac out put.
