Question
Download Solution PDFWhich of the following statements is INCORRECT for parallel resonance?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct option is 1
Concept:
Parallel resonance, also known as antiresonance, in electric circuits, occurs when the circuit's impedance is at its maximum, causing the current to be at its minimum. At this point, the reactive power is zero because the power factor is unity, indicating zero phase difference between current and voltage.
1) At resonance, the power factor will be zero. - This statement is incorrect. At the point of resonance in a parallel resonance, the circuit is resistive and the power factor is unity, not zero.
2) At resonance, the impedance will be maximum. - This statement is correct. Parallel resonance is defined by the maximum impedance and minimum line current.
3) At resonance, the line current will be in phase with the applied voltage. - This statement is correct. As stated earlier, at resonance, the power factor is unity, meaning the current is in phase with the voltage.
4) At resonance, the current will be minimum. - This statement is correct. At parallel resonance, the circuit impedance is at its maximum, which in turn causes the line current to be at its minimum.
Therefore, among the provided options, the incorrect statement for parallel resonance is:
At resonance, the power factor will be zero.
Last updated on May 29, 2025
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