0
Is it OK to use an unpolarised capacitor in a circuit where there was originally a polarised one?
Wiki User
∙ 13y ago
Well... Maybe yes, maybe no. It depends on two things. First, the physical size of the non-polarized capacitor may well be larger than the original size of the polarized capacitor, so it might not fit. Second, you have to consider the RMS current rating of the capacitor. Often, a polarized capacitor, such as an electrolytic capacitor, is intended to be used in a power supply, and is rated for a certain RMS current. A non-polarized capacitor, however, might not be rated for the same or higher RMS current, so it would not be able to handle the load.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
Are transistors polarised?
No it alternates the power from the circuit/circuits.
Is capacitor a part of integrated circuit?
A small capacitor can be part of an integrated circuit.
Why the oil filled capacitor is used in permanent split capacitor motor?
An oil filled capacitor is used in (PSC) motor because the capacitor is in the circuit the whole time the machine is running. The capacitor is oil filled to cool it due to being in circuit the whole time
Why capacitor behave as open circuit against alternating current?
Capacitors store electrical charge. Imagine we have a capacitor. At time 0 seconds we connect a DC voltage across the capacitor - immediately as the voltage is connected the capacitor is at 0 volts and the maximum current (relative to the circuit resistance) flows. At this extreme the capacitor can be treated as a short circuit, so for high frequency AC volts we should treat a capacitor as being a short circuit. As time passes the current in the circuit will go down and the voltage of the capacitor will go up - this is because as the capacitor gains more charge it gains more voltage, lowering the voltage across any resistance in the circuit consequently lowering the current in the circuit. When the capacitor is virtually full no current will flow at all and the voltage across the capacitor will equal the DC source voltage. At this extreme the capacitor can be treated as an open circuit, so for low frequency AC (allowing the capacitor to fill up before the current alternates) we can treat the capacitor as being an open circuit. Technically, it is not an open/closed circuit when it comes to AC because the capacitance will results in a signal lag or lead. However, if the frequency is low/high enough the lag/lead is often negligable.
What is parasitic capacitor?
It constantly "drains" the circuit
What is the capacitor and how many types?
A capacitor is a circuit component that stores energy in the electric field set up between its plates.Capacitors are named after the dielectric used to separate their plates (e.g. 'mica' capacitor), and there are lots of different types of dielectric used (too many to list), so there are a corresponding number of types of capacitor.But you can also categorise a capacitor as being 'polarised' or 'non-polarised'; electrolytic capacitors are 'polarised', which means that they must be connected into a circuit while taking into account the polarity of their terminals.Finally, you can categorise them as being 'fixed value' or 'variable'.
What is a non polarized capacitor?
A polarized capacitor is one which has a polarity, positive on one terminal, negative on the other. This makes it superficially look like a battery. In use, the capacitor has its positive voltage always higher than that on the negative terminal, it matters that this is the case and this gives rise to the term polarized. This sort of capacitor is commonly found in power supply filters.
Are transistors polarised?
No it alternates the power from the circuit/circuits.
Is capacitor a part of integrated circuit?
A small capacitor can be part of an integrated circuit.
How do you wire back to back capacitors?
Depends a little on the sort of capacitor and what you want to do. For example, if you have a pair of polarised electrolytic caps, you can connect the two negs together and then simply connect two wires, one to each positive to make a non-polarised electrolytic capacitor. It isn't ideal but can certainly get you out of a hole. Some people (depending on the application) also place a blocking diode over each cap so that each cap cannot be reverse charged. So....if this is waht you mean - then "connect the two negs together and then use the two positives only to connect to the circuit. Capacity will be half of the value of the two caps used. eg: a 100U capacitor back to back with another 100U capacitor will give you nominally 50U non polarised capacitor.
What happens to the current in a circuit as a capacitor charges?
What happens to the current in a circuit as a capacitor charges depends on the circuit. As a capacitor charges, the voltage drop across it increases. In a typical circuit with a constant voltage source and a resistor charging the capacitor, then the current in the circuit will decrease logarithmically over time as the capacitor charges, with the end result that the current is zero, and the voltage across the capacitor is the same as the voltage source.
Effect of shorting out the capacitor in a clamping circuit?
Any circuit using a capacitor will not work if the cap is short-circuited.
How one can know that what kind of capacitor to use in circuit?
paper capacitor
What to expect if a resistor is placed in a dc circuit with a capacitor?
when we replace the resistor with a capacitor ,the current will flow until the capacitor charge when capacitor will fully charged there is no current through the circuit because now capacitor will act like an open circuit. for more info plz E-mailt me at "zaib.zafar@yahoo.com"
Can a capacitor limit current in a circuit?
No.
What does a capacitor do in an amplifier circuit?
not sure
A W pf capacitor is connected into a 240 V Hz circuit. what is the current flow in this circuit?
a 30 pf capacitor is connected into a 240v, 60 hz circuit. what is the current flow into the circuit
