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Question:

A 30 kohms resistor is in series with a 80 mH inductor and an ac source?

Calculate the impedance of the circuit if the source frequency is 60 Hz and when it is 6.9*10^4 Hz

Answer:

R30 x 10^3 ohms L80 x 10^6 henry f60hz omega2(pi)f120(pi) impedence by inductoromega*L impedence by resistorR total impedenceroot of(R(square) + Omega*L(square))

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