What is the effect of increasing the capacitance in a capacitive AC circuit? (20

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Question: What is the effect of increasing the capacitance in a capacitive AC circuit? (2023)

Options:

Correct Answer: Increases current

Exam Year: 2023

Solution:

In a capacitive AC circuit, increasing the capacitance decreases the capacitive reactance (X_C), which increases the current (I = V/X_C).

What is the effect of increasing the capacitance in a capacitive AC circuit? (2023)

What is the effect of increasing the capacitance in a capacitive AC circuit? (2023)

Step 1: Understand that a capacitive AC circuit has a component called capacitance, which is measured in farads (F).
Step 2: Know that capacitive reactance (X_C) is a measure of how much the capacitor resists the flow of alternating current (AC). It is calculated using the formula X_C = 1 / (2 * π * f * C), where f is the frequency and C is the capacitance.
Step 3: Realize that if you increase the capacitance (C), the value of X_C decreases because they are inversely related.
Step 4: Remember that the current (I) in the circuit can be calculated using the formula I = V / X_C, where V is the voltage.
Step 5: Since X_C decreases when capacitance increases, the current (I) will increase because you are dividing the voltage (V) by a smaller number (X_C).

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