# NEET Physics Alternating Current Questions Solved

BOARD

(a) Figure shows the variation of resistance and reactance versus angular frequency. Identify the curve which corresponds to inductive reactance and resistance.

(b) Show that series LCR circuit at resonance behaves as a purely resistive circuit.

Compare the phase relation between current and voltage in series LCR circuit for (i) XL > XC (ii) XL = XC using phasor diagrams.

 c) What is an acceptor circuit and where it is used? (1+3+1)

 (a) B : inductive reactance (1/2) C: resistance (1/2) (b) At resonance XL= XC (1/2) Z = [(XL- XC)2 + R2]1/2 , Z =R (1/2) Phasor diagrams (1+1) phase difference is ϕ

same phase.

 (c ) Acceptor circuit: Series LCR circuit (1/2)

Radio tunning                                                                   ($1}{2}$)

Difficulty Level:

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