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The feature of an approximate model of a transistor is

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The feature of an approximate model of a transistor is

(a) it helps in quicker analysis

(b) it provides individual analysis for different configurations

(c) it helps in dc analysis

(d) ac analysis is not possible

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This intriguing question originated from The AC Analysis of a Small-Signal Low-Frequency Common Emitter Transistor. topic in chapter Small-Signal Low-Frequency AC models of Transistors of Electronic Devices & Circuits

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The correct choice is (a) it helps in quicker analysis

The explanation: The small signal model helps in quicker ac analysis of a transistor. The approximate model is applicable for all the configurations. The dc analysis is not obtained by using a small signal model of transistor.

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