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Electronics and Communication Engineering - Networks Analysis and Synthesis - Discussion

Discussion Forum : Networks Analysis and Synthesis - Section 4 (Q.No. 22)
Networks Analysis and Synthesis
22.
An RL series circuit has an impedance of 20 Ω when frequency is 25 Hz. At f= 50 Hz, the impedance will be
40 Ω
20 Ω
less than 40 W but more than 20 Ω
less than 20 W but more than 10 Ω
Answer: Option
Explanation:

Z = R2 + XL2. When frequency is doubled, XL becomes twice but R remains the same.

Discussion:
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