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At resonant frequency an R-L-C circuit draws maximum current due to the reason that
  • a)
    the difference between capacity reactance and inductive reactance is zero
  • b)
    the impedance is more than resistance
  • c)
    the voltage across the capacitor equals the applied voltage
  • d)
    the power factor is less than unity
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
At resonant frequency an R-L-C circuit draws maximum current due to th...
Explanation:

Resonant Frequency:
- Resonant frequency is the frequency at which an R-L-C circuit draws maximum current.

Reactance at Resonant Frequency:
- At resonant frequency, the difference between capacitive reactance (Xc) and inductive reactance (Xl) becomes zero.
- This is because at resonant frequency, the capacitive reactance and inductive reactance cancel each other out, resulting in a net reactance of zero.

Maximum Current:
- When the reactance becomes zero, the impedance of the circuit is purely resistive.
- At this point, the circuit offers minimum opposition to the flow of current, resulting in the maximum current flow through the circuit.

Other Options:
- The impedance being more than resistance (Option B) is not the reason for maximum current flow at resonant frequency.
- The voltage across the capacitor equaling the applied voltage (Option C) is not the reason for maximum current flow at resonant frequency.
- The power factor being less than unity (Option D) is also not the reason for maximum current flow at resonant frequency.
Therefore, the correct answer is option 'A' - the difference between capacitive reactance and inductive reactance being zero at resonant frequency, allowing maximum current flow through the R-L-C circuit.
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