In a series RLC circuit, what happens to the current at resonance?

Practice Questions

Q1
In a series RLC circuit, what happens to the current at resonance?
  1. Maximum
  2. Minimum
  3. Zero
  4. Constant

Questions & Step-by-Step Solutions

In a series RLC circuit, what happens to the current at resonance?
  • Step 1: Understand what a series RLC circuit is. It consists of a resistor (R), inductor (L), and capacitor (C) connected in a single loop.
  • Step 2: Know what resonance means. Resonance occurs when the frequency of the source matches the natural frequency of the circuit.
  • Step 3: At resonance, the inductive reactance (XL) and capacitive reactance (XC) cancel each other out. This means they are equal in value.
  • Step 4: When XL and XC cancel each other, the total impedance of the circuit is minimized, which allows maximum current to flow.
  • Step 5: Therefore, at resonance, the current in the series RLC circuit reaches its maximum value.
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