Networks Analysis and Synthesis - Engineering

Q1:

A T network is inserted between source and R as shown in figure. The resistance seen by the source remains the same with or without T network when R is

A 5 Ω

B 10 Ω

C 15 Ω

D 20 Ω

ANS:D - 20 Ω

If R = 15 Ω resistance, seen by the source = .