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3 cards from this section. Quick, good the night before a test.
What is the formula for capacitive reactance?
Consider how capacitance and frequency relate.
In an AC circuit, does the average power in a capacitive load equal zero?
Think about energy storage in a capacitor.
What is the relationship between current and voltage in a capacitive circuit?
Consider the charging and discharging behavior of capacitors.
Does a capacitor store energy?
Think about the role of capacitors in circuits.
A 50µF capacitor is connected to a 120V, 60Hz AC supply. Calculate the capacitive reactance and the peak current in the capacitor.
Start with calculating w and use the formulae for reactance.
In a circuit, if the capacitance of a capacitor is doubled while keeping frequency fixed, what would happen to the peak current and capacitive reactance?
Consider the formulas for reactance and current.
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