Networks Analysis and Synthesis - Engineering

Q1:

In an R-L circuit, the impedance is 30 Ω at a frequency of 100 Hz. At 200 Hz, the impedance should be

A 30 Ω or more

B 60 Ω or more

C 15 Ω or less

D more than 30 Ω but less than 60 Ω

ANS:D - more than 30 Ω but less than 60 Ω

Z = (R2 + ω2L2)0.5.