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Problem 78 of 132

Thévenin Resistance With a Dependent Source

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The dependent source delivers k ixk\,i_x into node xx, where ixi_x is the current through R1R_1. There are no independent sources, so Vth=0V_{th} = 0. Find RthR_{th} seen from aa–bb, in ohms.

R1​5 ΩR2​20 Ω3.5 ix​abix​x
Ω

Answers within 2% are accepted. Units with SI prefixes work too, like 0.003 A or 3 mA. Use a minus sign for negative values.

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