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Capacitors in connected in series result in a higher voltage rating, but lower capacitance. Two 470uF 50V capacitors connected in series will give you a total of 235uF, but you can put up to 100V across the series combination.
Two 470uF 50V capacitors connected in parallel will give you a total of 940uF, across which you can put 50V (the voltage rating does not change for capacitors in parallel).
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Function of dielectric in a capacitor?
The main role of dielectrics in capacitors is to increase the value of capacitance of the capacitor.
Why does capacitance increase when the distance between the plates of a capacitor is increased?
you have it reversed. capacitance increases with decrease in distance of plates.
What will happen when a dielectric slab is inserted in the parallel plate capacitor?
(a) Charge Will increase (b) Potential difference will stay the same (c) Capacitance will increase (d) Stored energy will decrease
In pn junction the depletion region capacitance increase with reverse bias or decrease?
any capacitance is given by equation C = (epsilon * A/ d) where d is distance between two plates, thus as d reduces C increases. Now, in depletion region as we increase reverse bias, the depletion region width increases. Now consider depletion region as a parallel plate capacitor, with positive charges on n side and negative charges on p side. Thus, as reverse bias increases, d of junction capacitance increases thus capacitance reduces. On other hand, as reverse bias reduces, d of junction capacitance reduces, thus capacitance increases. -Amey Churi
What are the possible remedies against corona because of extra high voltage?
increase the size of conductor ,provide the hallow conductor,increase the critical disruptive voltage bv providing shunt capacitors. these capacitors increases the power capacity of the line.
What would be the effective capacitance if two capacitors are connected in parallel?
A: the capacitance will increase. in series it will decrease accordingly CPARALLEL = Summation1-N (CN) CSERIES = 1 / Summation1-N (1 / CN)
Why the charge is not equal if you connect the capacitors on parallel?
When capacitors are connected in parallel, the total capacitance is the sum of the individual capacitors' capacitances. If two or more capacitors are connected in parallel, the overall effect is that of a single equivalent capacitor having the sum total of the plate areas of the individual capacitors. As we've just seen, an increase in plate area, with all other factors unchanged, results in increased capacitance.The total capacitance is more than any one of the individual capacitors' capacitances.The equivalent capacitance of two or more capacitors connected in parallel is simply the sum of the individual capacitances.
Function of dielectric in a capacitor?
The main role of dielectrics in capacitors is to increase the value of capacitance of the capacitor.
In series and parallel capacitance?
When capacitors are connected in series, the totalcapacitance is less than any one of the series capacitors' individual capacitances. If two or more capacitors are connected in series, the overall effect is that of a single (equivalent) capacitor having the sum total of the plate spacings of the individual capacitors. As we've just seen, an increase in plate spacing, with all other factors unchanged, results in decreased capacitance.Thus, the total capacitance is less than any one of the individual capacitors' capacitances. The formula for calculating the series total capacitance is the same form as for calculating parallel resistances:When capacitors are connected in parallel, the totalcapacitance is the sum of the individual capacitors' capacitances. If two or more capacitors are connected inparallel, the overall effect is that of a single equivalent capacitor having the sum total of the plate areas of the individual capacitors. As we've just seen, an increase inplate area, with all other factors unchanged, results inincreased capacitance.Thus, the total capacitance is more than any one of the individual capacitors' capacitances. The formula for calculating the parallel total capacitance is the same form as for calculating series resistances:As you will no doubt notice, this is exactly opposite of the phenomenon exhibited by resistors. With resistors, seriesconnections result in additive values while parallel connections result in diminished values. With capacitors, its the reverse: parallel connections result in additive values while series connections result in diminished values.REVIEW:Capacitances diminish in series.Capacitances add in parallel.
Why does capacitance increase when the distance between the plates of a capacitor is increased?
you have it reversed. capacitance increases with decrease in distance of plates.
How do you decrease resonant frequency of a series-tuned circuit?
To decrease the resonant frequency of any tuned circuit, increase the inductance and/or increase the capacitance.
What would happen if the length of wire increase what happens to the capacitance?
capacitance also increase
Why capacitance increase with a decrease in distance between plates?
Capacitance increases with a decrease in distance between plates because the electric field between the plates becomes stronger, storing more electric charge per unit voltage. This results in a higher capacitance value since the plates can hold more charge for the same applied voltage.
Does capacitance increase when the temperature increases?
It depends on what the capacitance is. 1. Capacitors may show a positive temperature coefficient, 2. "N750" ceramic capacitors have a negative coefficient of -750 parts per million per degree (ppm/º), 3. "NPO" ceramic types have a substantially zero ppm/º. Check the Wikipedia entry for "ceramic capacitor" for more info.
What will happen when a dielectric slab is inserted in the parallel plate capacitor?
(a) Charge Will increase (b) Potential difference will stay the same (c) Capacitance will increase (d) Stored energy will decrease
Is the capacitor used in the ac system to reduce line voltage?
Usually capacitors in an AC system are there to improve the power factor. Transformers are used to increase or decrease line voltages.
What should we do to increase the capacitance of a capacitor?
Not much if it is a fixed capaitor. If it is a variable capacitor, rotating the shaft to mesh the two sets of plates more closely will increase the capacitance.
