A bipolar transistor is operating in the active region with a collector current of 1 mA. The β of the transistor is 100 and the thermal voltage (VT) is 25 mV. The trans-conductance (gm) and the input resistance (rπ) of the transistor in the common-emitter configuration are, respectively

A bipolar transistor is operating in the active region with a collecto

1.	A bipolar transistor is operating in the active region with a collector current of 1 mA. The β of the transistor is 100 and the thermal voltage (VT) is 25 mV. The trans-conductance (gm) and the input resistance (rπ) of the transistor in the common-emitter configuration are, respectively
A.	25 mA/V and 15.625 kΩ
B.	40 mA/V and 4.0 kΩ
C.	25 mA/V and 2.5 kΩ
D.	40 mA\V and 2.5 kΩ
Answer» E.