Capacitance Fundamentals

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What is capacitance?
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Capacitance is the ability of a system to store an electric charge per unit voltage.
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What is the formula for capacitance?
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The formula for capacitance is C = Q/V, where C is capacitance, Q is charge, and V is voltage.
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What is a capacitor?
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A capacitor is an electronic component that stores electric charge and energy in the electric field.
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How does plate area affect capacitance?
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Capacitance increases as the plate area increases.
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How does plate separation affect capacitance?
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Capacitance decreases as the plate separation increases.
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What is dielectric material in a capacitor?
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A dielectric material is an insulating substance placed between the plates of a capacitor to increase its capacitance.
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What is dielectric constant?
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The dielectric constant is a measure of a material's ability to increase capacitance compared to a vacuum.
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What is the unit of capacitance?
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The unit of capacitance is the farad (F).
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What is the role of a capacitor in an AC circuit?
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In an AC circuit, a capacitor allows AC signals to pass while blocking DC signals.
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What happens to a capacitor in a DC circuit?
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In a DC circuit, a capacitor charges up to the supply voltage and then blocks the flow of DC current.
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How is energy stored in a capacitor?
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Energy in a capacitor is stored as electric potential energy in the electric field between its plates.
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What factors affect a capacitor's internal resistance?
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Internal resistance is affected by the capacitor’s construction, materials, and temperature.
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What is the function of a supercapacitor?
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A supercapacitor stores a large amount of energy quickly and delivers power efficiently compared to regular capacitors.
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What is the time constant in a capacitor circuit?
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The time constant is the product of a capacitance and resistance in a circuit, and it indicates how quickly the capacitor charges or discharges.
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What is the relationship between current and voltage in a charging capacitor?
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The current decreases exponentially as the capacitor charges, while the voltage increases towards the supply voltage exponentially.
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