What is the effect of increasing the capacitance in a capacitor in an AC circuit

Practice Questions

Q1
What is the effect of increasing the capacitance in a capacitor in an AC circuit on the current?
  1. Increases current
  2. Decreases current
  3. No effect
  4. Current becomes zero

Questions & Step-by-Step Solutions

What is the effect of increasing the capacitance in a capacitor in an AC circuit on the current?
  • Step 1: Understand what a capacitor is. A capacitor stores electrical energy in an electric field.
  • Step 2: Know that in an AC (Alternating Current) circuit, the capacitor reacts to the changing current.
  • Step 3: Learn about capacitive reactance (X_C). This is the opposition that a capacitor offers to the flow of AC current.
  • Step 4: The formula for capacitive reactance is X_C = 1 / (2 * π * f * C), where f is the frequency of the AC signal and C is the capacitance.
  • Step 5: If you increase the capacitance (C), the value of X_C decreases because they are inversely related.
  • Step 6: When the capacitive reactance (X_C) decreases, it allows more current (I) to flow through the circuit.
  • Step 7: Therefore, increasing the capacitance in an AC circuit results in an increase in the current.
No concepts available.
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