A common emitter transistor amplifier has a collector current of 10mA, when its base current is 25µA at the room, temperature. What is input resistance?

A common emitter transistor amplifier has a collector current of 10mA

1.	A common emitter transistor amplifier has a collector current of 10mA, when its base current is 25µA at the room, temperature. What is input resistance?
A.	3kΩ
B.	5kΩ
C.	1kΩ
D.	7kΩ
Answer» D. 7kΩ

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A common emitter transistor amplifier has a collector current of 10mA, when its base current is 25µA at the room, temperature. What is input resistance?

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