[Solved] The negative sign in the formula of amplification factor indicates

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Q.	The negative sign in the formula of amplification factor indicates
A.	that ie flows into transistor while ic flows out it
B.	that ic flows into transistor while ie flows out it
C.	that ib flows into transistor while ic flows out it
D.	that ic flows into transistor while ib flows out it
Answer» A. that ie flows into transistor while ic flows out it
Explanation: when no signal is applied, the ratio of collector current to emitter current is called dc alpha, αdc of a transistor. αdc=- ic/ie. it is the measure of the quality of a transistor. higher is the value of α, better is the transistor in the sense that collector current approaches the emitter current.

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