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A capacitor is a device that stores electrical energy in an electric field. It is a passive electronic component with two terminals. The effect of a capacitor is known as capacitance. While some capacitance exists between any two electrical conductors in proximity in a circuit , a capacitor is a component designed to add capacitance to a circuit. The capacitor was originally known as a condenser or condensator. The physical form and construction of practical capacitors vary widely and many types of capacitor are in common use. Most capacitors contain at least two electrical conductors often in the form of metallic plates or surfaces separated by a dielectric medium.
Several capacitors can be connected together to be used in a variety of applications. Multiple connections of capacitors behave as a single equivalent capacitor. The total capacitance of this equivalent single capacitor depends both on the individual capacitors and how they are connected. Capacitors can be arranged in two simple and common types of connections, known as series and parallel , for which we can easily calculate the total capacitance. These two basic combinations, series and parallel, can also be used as part of more complex connections. As for any capacitor, the capacitance of the combination is related to both charge and voltage :. When this series combination is connected to a battery with voltage V , each of the capacitors acquires an identical charge Q.
4 in parallel: C. = 10 + 10 = 20 μF. ◇C. 1., C. , C. 2 in series. →How much charge provided by battery to fully charge capacitors? Assume V = ◇Q = C.
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. The formula for calculating the series total capacitance is the same form as for calculating parallel resistances :. 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. The formula for calculating the parallel total capacitance is the same form as for calculating series resistances :.
These solutions for Capacitors are extremely popular among Class 12 Science students for Physics Capacitors Solutions come handy for quickly completing your homework and preparing for exams. Also, we know that the electric field inside a capacitor is zero.
Capacitance. • Combinations of capacitors (series and parallel). • Energy stored in capacitor (electric field). • start chapter 31 (Fundamentals of Circuits).
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