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MHT CET202012 Oct 2020Morning ShiftPhysicsAlternating CurrentActual

A parallel combination of pure inductor and capacitor is connected across a source of alternating e.m.f. 'e'. The currents flowing through an inductor and capacitor are i_ L and i_ C respectively. In this parallel resonant circuit, the condition for currents i , i_ L and i_ C is ( i= net r .m.s. current in the circuit)

Options

  1. Ai 0, i_ L =i_ C 0
  2. Bi 0, i_ L =i_ C =0
  3. Ci i_ L =i_ C
  4. Di 0, i_ L i_ C

Correct answer

A. i 0, i_ L =i_ C 0

Step-by-step solution

In parallel resonant circuit, the capacitive and inductive reactance are equal, hence currents are equal but 180^ out of phase with each other. The net current is zero. i =0, i ₂= i _ c 0

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