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The change in collector emitter voltage from 6V to 9V causes increase in collector current from 6mA to 6.3mA. Determine the dynamic output resistance.

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The change in collector emitter voltage from 6V to 9V causes increase in collector current from 6mA to 6.3mA. Determine the dynamic output resistance.

(a) 20kΩ

(b) 10kΩ

(c) 50kΩ

(d) 60kΩ

The question was posed to me during an interview.

This interesting question is from Biasing Parameters topic in section Small-Signal Low-Frequency AC models of Transistors of Electronic Devices & Circuits

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Correct option is (b) 10kΩ

Explanation: ro=∆VCE/∆IC

=3/0.3m=10kΩ.

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