0
In a sense, a capacitor IS a battery. But a very small one. A typical 33uF capacitor will hold about 33uC - that is, 33uA (microamperes) per second. At 16V potential, that will be around 528uC of charge (or 528uA in a second).
In contrast, a 1.5V AA battery can typically provide between 1.5 and 1.8Ah (ampere-hours) at 1.5V. That is - a device drawing 1.8A (amperes) will keep running off of such a battery for about an hour. The same device would consume the charge stored in our 33uF capacitor in 1/54545th of a second.
So in the end - no, it's not likely that a capacitor would be a feasible means to store large amounts of charge.
Rather, capacitors are used wherever oscillating circuits are needed (a basic R-C oscillator can be built from a capacitor and a resistor), and wherever "voltage smoothing" is required - the amount of charge a capacitor holds wouldn't run a small pocket light, but it would be enough to "fill in the gap" if a momentary voltage drop occured in a line-powered device.
Capacitors are also used in this very manner to reduce ("de-couple") mains hum (50Hz or 60Hz, depending on the continent) by "filling the voids" that are left over in the rectified DC voltage when the AC voltage phase passes through 0V.
Wiki User
∙ 13y ago
Add your answer:
Earn +20 pts
What is use of capacitor in electronics circuit?
to limit the current and to use it as a back up battery capacitors are used ..
What happens when a capacitor reaches a steady state?
when a capacitor reaches it, it acts as a battery
An air-filled parallel-plate capacitor is connected to a battery and allowed to charge up Now a slab of dielectric material is placed between the plates of the capacitor while the capacitor is still?
the charge on the capacitor had increased.
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.
How can you use a 3 phase capacitor as a single phase capacitor?
Just use any two of the three terminals that are available, this will give you a single phase capacitor.
What devices do you use to store electricity?
capacitor inductor battery
What will happen if you connect 12volt battery to a 240VOLT capacitor?
If the capacitor is charged then the battery will explode.
Can you use a high voltage capacitor on a low voltage battery?
Yes. You just don't want to exceed the voltage rating of the capacitor.
What is use of capacitor in electronics circuit?
to limit the current and to use it as a back up battery capacitors are used ..
Why you use capacitor as a filter in power supply?
capacitor acts as a small battery ,during rectification ac to dc it gets some blank space (no current) to fill this current from capacitor is used.
What capacitor value is good for car battery?
A car battery does not need a capacitor as it's regulating capacity (when in good condition) is well above any capacitor you can fit into your car.
What happens when a capacitor reaches a steady state?
when a capacitor reaches it, it acts as a battery
Can you use a battery in place of capacitor?
Batteries and capacitors serve quite different purposes and are usually not interchangeable.
Why the flash of a camera is commonly powered by a capacitor?
Camera flashes use a capacitor because a capacitor can dump a lot of electrical energy very quickly. Much faster than a battery. That's how to produce a quick flash by using a capacitor that suddenly discharges the electricity.
When should you put a capacitor in your car?
When a stereo system drains too much battery power, it is time to add a capacitor. The capacitor will not increase the battery, but instead will modulate it allowing for additional stereo usage.
Describe the response of a capacitor when connected to and then disconnected from a battery?
A capacitor that is suddenly connected to a battery will charge to the battery voltage. The time to do this is dependent on the current capacity of the battery and wiring, and the capacitance of the capacitor. This represents an instantaneous short circuit, which lasts for a (usually) very short time - but damage could be done if there was no resistance. A charged capacitor that is suddenly disconnected from a battery will hold that voltage. The length of time it will hold is dependent on how much leakage current there is.
Can you use a farad capacitor as a battery capacitor?
No. The large farad capacitors are not designed to pass a lot of current. They are intended for ultra-low current applications such as memory retention in a CMOS type device.
