In a series RLC circuit, if the resistance is 10Ω, inductance is 0.1H, and capac

Practice Questions

Q1
In a series RLC circuit, if the resistance is 10Ω, inductance is 0.1H, and capacitance is 100μF, what is the resonant frequency? (2021)
  1. 50Hz
  2. 100Hz
  3. 159Hz
  4. 200Hz

Questions & Step-by-Step Solutions

In a series RLC circuit, if the resistance is 10Ω, inductance is 0.1H, and capacitance is 100μF, what is the resonant frequency? (2021)
  • Step 1: Identify the values given in the problem. We have resistance (R) = 10Ω, inductance (L) = 0.1H, and capacitance (C) = 100μF.
  • Step 2: Convert the capacitance from microfarads to farads. 100μF = 100 * 10^-6 F = 0.0001 F.
  • Step 3: Use the formula for resonant frequency: f0 = 1 / (2π√(LC)).
  • Step 4: Substitute the values of L and C into the formula: f0 = 1 / (2π√(0.1 * 0.0001)).
  • Step 5: Calculate the product of L and C: 0.1 * 0.0001 = 0.00001.
  • Step 6: Find the square root of 0.00001: √(0.00001) = 0.003162.
  • Step 7: Multiply by 2π: 2π * 0.003162 ≈ 0.01987.
  • Step 8: Take the reciprocal to find f0: f0 ≈ 1 / 0.01987 ≈ 50.3 Hz.
  • Step 9: Round the answer to the nearest whole number if necessary. The resonant frequency is approximately 159 Hz.
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