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What is the value of output resistance in the simplified CE hybrid model?

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What is the value of output resistance in the simplified CE hybrid model?

(a) ∞

(b) 0

(c) hic

(d) hie

The question was asked in class test.

This key question is from Simplified CE Hybrid Model topic in portion Low Frequency Transistor Amplifier Circuit of Electronic Devices & Circuits

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Correct choice is (a) ∞

For explanation: The output resistance in a simplified common emitter hybrid model is calculated as the ratio of collector voltage over collector current while VS is equal to zero and RL is omitted. Due to this configuration IC is equal to zero and hence output resistance is infinite.

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