What is the effect of increasing the frequency on the capacitive reactance in an
Practice Questions
Q1
What is the effect of increasing the frequency on the capacitive reactance in an AC circuit? (2022)
Increases
Decreases
Remains the same
Becomes zero
Questions & Step-by-Step Solutions
What is the effect of increasing the frequency on the capacitive reactance in an AC circuit? (2022)
Step 1: Understand what capacitive reactance (Xc) is. It is a measure of how much a capacitor resists the flow of alternating current (AC).
Step 2: Know the formula for capacitive reactance: Xc = 1/(2πfC). Here, 'f' is the frequency of the AC signal and 'C' is the capacitance of the capacitor.
Step 3: Identify the relationship between frequency (f) and capacitive reactance (Xc) in the formula. As frequency (f) increases, the value of 2πfC in the denominator becomes larger.
Step 4: Realize that if the denominator of a fraction increases, the overall value of the fraction decreases. Therefore, as frequency increases, Xc decreases.
Step 5: Conclude that increasing the frequency in an AC circuit will decrease the capacitive reactance.
