When the emitter current of a transistor is changed by 1 mA, its collector current changes by 0.990 mA. The common-emitter short-circuit current gain is

When the emitter current of a transistor is changed by 1 mA, its colle

1.	When the emitter current of a transistor is changed by 1 mA, its collector current changes by 0.990 mA. The common-emitter short-circuit current gain is
A.	1
B.	199
C.	99
D.	9.9
Answer» D. 9.9