What is the magnitude of the circulating current within the components of a parallel LC circuit at resonance?
It is at a minimum
It is at a maximum✓Правильный ответ
It equals 1 divided by the quantity 2 times pi, times the square root of (inductance L multiplied by capacitance C)
It equals 2 times pi, times the square root of (inductance L multiplied by capacitance C)
Объяснение
In a parallel resonant circuit the inductive and capacitive branch currents are equal and opposite, so they largely cancel at the terminals while continuing to circulate around the LC loop; that circulating current reaches its maximum at resonance even though the current drawn from the source is at its minimum. The two remaining choices are fragments of the resonant-frequency relationship and are times, not currents, so they cannot answer the question at all.