Circuit Theorems and Conversions

Find R_N for the circuit given.

A 34

B 68

C 120

D 154

ANS:D - 154

Just assume 2 things.
1, Short the voltage source.
2. Open the RL load.

And let as assume voltage source at the place of RLload. Now solve the problem 68ohms.

68ohms =34ohms, 34 in series with 120 ohms = 154 ohms total.

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