Capacitor Questions: 11th Grade Quiz!

The unit of capacitance is Farad. Capacitance is a measure of the ability of a capacitor to store an electric charge. It is defined as the ratio of the electric charge stored on the capacitor to the potential difference across it. Farad is the SI unit for capacitance, named after the English physicist Michael Faraday. It is a relatively large unit, so smaller values of capacitance are often expressed in subunits such as micro Farad (10^-6 Farad) or nano Farad (10^-9 Farad).

The picture shows capacitors connected in series. This can be determined by observing that the positive terminal of one capacitor is connected to the negative terminal of the next capacitor, creating a continuous loop. In a series connection, the total capacitance is reduced and the total voltage across the capacitors is divided between them.

The total capacitance is 9 micro Farad because it is the only option that matches the given answer.

The formula to calculate the total capacitance in parallel is used when multiple capacitors are connected in parallel. In this configuration, the total capacitance is equal to the sum of the individual capacitances. This means that the capacitors share the same voltage across them, but the total capacitance increases. This formula is not applicable for series connections, as the total capacitance in series is calculated differently. Therefore, the correct answer is "Parallel".

The correct answer is Polarized capacitor. The symbol in the picture represents a polarized capacitor. A polarized capacitor is a type of capacitor that has a positive and negative terminal, indicating a specific polarity. This type of capacitor is designed to be used in circuits where the polarity of the voltage is important. It is important to connect a polarized capacitor in the correct orientation to ensure proper functionality.

Capacitors store energy in the form of an electric field. When a voltage is applied across the capacitor, it creates an electric field between its plates. This electric field stores the energy in the form of potential energy, which can be released when the capacitor is discharged. The energy is stored in the electric field between the plates, not in a magnetic field.

The correct answer is "No chemical is used." This is because one of the main differences between a capacitor and a battery is the absence of chemical reactions in a capacitor. While a battery relies on chemical reactions to generate and store electrical energy, a capacitor does not involve any chemical processes. Instead, a capacitor stores energy in an electric field between its plates, without the need for any chemical reactions.

The picture shows a symbol that represents a variable capacitor. A variable capacitor is a type of capacitor whose capacitance can be adjusted manually or automatically. It is used in electronic circuits where the capacitance needs to be changed for tuning or adjusting the frequency of a circuit. The symbol in the picture resembles two parallel lines with an arrow pointing towards them, which is commonly used to represent a variable capacitor in circuit diagrams.

The formula for calculating the total capacitance in series is obtained by adding the reciprocals of the individual capacitances. This is because in a series circuit, the total capacitance is reduced as the capacitors are connected in a way that the same amount of charge is stored on each capacitor. Therefore, the formula for calculating the total capacitance in series is 1/Ctotal = 1/C1 + 1/C2 + 1/C3 + ... + 1/Cn.

The value of a capacitor depends on both the plate area and the distance between the plate and the dielectric. The plate area determines the amount of charge that can be stored on the capacitor, while the distance between the plate and the dielectric affects the capacitance by determining how much electric field can be established for a given voltage. Therefore, both factors are essential in determining the value of a capacitor.

The symbol in the picture represents a non-polarized capacitor. A non-polarized capacitor is a type of capacitor that can be connected in any direction in a circuit. Unlike polarized capacitors, which have a positive and negative terminal, non-polarized capacitors do not have any polarity and can be used in both AC and DC circuits. This symbol is commonly used to represent non-polarized capacitors in circuit diagrams and schematics.

When a capacitor is connected to a battery, it will not get damaged. A capacitor is designed to store and release electrical energy, and when connected to a battery, it charges up and stores the electrical charge. As long as the voltage across the capacitor does not exceed its maximum rating, it will not get damaged. Therefore, the correct answer is that the capacitor will not be damaged when connected to a battery.

Capacitive reactance is a term used in electrical engineering to describe the opposition that a capacitor presents to alternating current (AC) flow. It is dependent on the frequency of the applied voltage and the capacitance of the capacitor. The formula used to calculate capacitive reactance is Xc = 1 / (2πfC), where Xc is the capacitive reactance, f is the frequency, and C is the capacitance. This formula allows engineers to determine the capacitive reactance of a circuit, which is crucial for analyzing and designing AC circuits involving capacitors.

The correct answer is "One Dielectric and two metal plates". A capacitor consists of two metal plates separated by a dielectric material. The dielectric material acts as an insulator and prevents direct contact between the plates, allowing the capacitor to store electrical energy. When a voltage is applied across the plates, charges accumulate on the plates, creating an electric field in the dielectric. This configuration allows the capacitor to store and release electrical energy when needed.

One micro Farad is equal to 0.0000001 Farad. This is because the prefix "micro" represents a factor of 10^-6. Therefore, when we convert micro Farad to Farad, we divide by 10^6, resulting in 0.0000001 Farad.