Examveda
Examveda

A 10 Ω resistor, a 90 mH coil, and a 0.015 µF capacitor are in series across an ac source. The impedance magnitude at 1,200 Hz below fr is

A. 1,616 Ω

B. 161 Ω

C. 3,387 Ω

D. 1,771 Ω

Answer: Option A

Join The Discussion

Comments ( 1 )

  1. Tapu Rayhan
    Tapu Rayhan :
    12 months ago

    fr = 1/2*pi*sqrt of LC.
    fr = 4331.648.

    f = fr-1200Hz=3131.64.
    Z = sqrt of(R^2+(XL-XC)^2).

    Z = 1617 ohm.

Related Questions on RLC Circuits and Resonance