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Questions  

In a series circuit R=300Ω,L=0.9H,C=2.0μF  and ω=1000rad/sec . The impendence of the circuit is

a
1300 Ω
b
900 Ω
c
500 Ω
d
400 Ω

detailed solution

Correct option is C

Given E=300 Ω, L=0.9H C=2.0 μF  and ω=1000 rad/sZ=R2+(XL−Xc)2     =R2+(ωL−1ωc)2     =3002+(1000×0.9−11000×2x10-6)2     =3002+(900−500)2     =3002+4002     =250000     =500 Ω

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