What is the effect of increasing the capacitance in an AC circuit? (2019)
Practice Questions
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Q1
What is the effect of increasing the capacitance in an AC circuit? (2019)
Increases inductive reactance
Decreases capacitive reactance
Increases total impedance
Decreases total current
Increasing the capacitance decreases the capacitive reactance (X_C = 1/(2πfC)), which can lead to an increase in current.
Questions & Step-by-step Solutions
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Q
Q: What is the effect of increasing the capacitance in an AC circuit? (2019)
Solution: Increasing the capacitance decreases the capacitive reactance (X_C = 1/(2πfC)), which can lead to an increase in current.
Steps: 6
Step 1: Understand what capacitance is. Capacitance is the ability of a component (capacitor) to store electrical energy.
Step 2: Know that in an AC (Alternating Current) circuit, capacitors react differently than in DC (Direct Current) circuits.
Step 3: Learn about capacitive reactance (X_C). It is a measure of how much a capacitor resists the flow of AC current. The formula is X_C = 1/(2πfC), where f is the frequency of the AC signal and C is the capacitance.
Step 4: Realize that if you increase the capacitance (C), the value of X_C decreases because they are inversely related.
Step 5: Understand that a decrease in capacitive reactance (X_C) means that the capacitor allows more current to flow through the circuit.
Step 6: Conclude that increasing the capacitance in an AC circuit can lead to an increase in current.
