→ Коллоквиум 1 Часть 4 → Rozpocznij Naukę / Ściągnij Fiszki MP3

Pytanie		Odpowiedź
What was early capacitor used for? rozpocznij naukę		The early capacitor (Leyden jar) was used to store static electric charge for experiments.
What is a capacitor? rozpocznij naukę		A capacitor is a passive electronic component that stores electrical energy in an electric field.
What does capacitor consist of? rozpocznij naukę		It consists of two conductive plates separated by an insulating material called a dielectric.
What happens when you connect your capacitor to the power supply? rozpocznij naukę		When connected to a DC power supply, current flows momentarily, charging the capacitor until the voltage across it equals the supply voltage, at which point current stops.
What is the key property of a capacitor? rozpocznij naukę		Its key property is capacitance, which is its ability to store electrical charge.
How can capacitance be denoted? rozpocznij naukę		It is denoted by the letter 'C'.
What is the unit of measurement for capacitance? rozpocznij naukę		The Farad (F).
What factors does capacitance depend on? rozpocznij naukę		It depends on the surface area of the plates (A), the distance between them (d), and the dielectric constant (ε) of the insulating material. (C = εA/d)
What affects the behaviour of capacitors in a circuit? rozpocznij naukę		The frequency of the applied voltage (AC vs. DC) and the circuit configuration.
How do capacitors behave in DC circuits? rozpocznij naukę		They act as an open circuit (infinite resistance) once fully charged, blocking DC current.
How do capacitors behave in AC circuits? rozpocznij naukę		They allow AC current to pass, but offer a frequency-dependent opposition called capacitive reactance.
How does relative permittivity affect capacitance? rozpocznij naukę		A higher relative permittivity (dielectric constant) of the insulating material increases the capacitance.
Can you give the formula for calculating the energy stored in a capacitor? rozpocznij naukę		The energy (E) is equal to one-half times the capacitance (C) times the voltage (V) squared.
What 3 effects of a capacitor in a circuit are mentioned in the video? rozpocznij naukę		Coupling, Decoupling, Filtering, and Energy Storage.
How can capacitors protect sensitive electronic components? rozpocznij naukę		As decoupling capacitors, they smooth out voltage spikes and provide a local reservoir of charge.
How can capacitors be used as filters? rozpocznij naukę		They can block low-frequency signals (DC) while passing high-frequency signals (AC), or be used in combination with resistors/inductors to create specific frequency response circuits.
What types of capacitors are mentioned in the video? Where are they used? rozpocznij naukę		Common types include ceramic (high-frequency circuits), electrolytic (power supply filtering, high capacitance), and film (precision applications).

Коллоквиум 1 часть 4

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