Question

Reverse collector saturation current ICBO is __________

(a) Collector current when emitter current is zero

(b) Collector current when base current is zero

(c) Same as reverse saturation current

(d) Collector current when either emitter or base current is zero

I had been asked this question in a job interview.

The question is from Operating Point of Transistor topic in portion Transistor Biasing and Low Frequencies of Analog Circuits

Answer 1

The correct choice is (a) Collector current when emitter current is zero

For explanation: Reverse collector current ICBO is collector-base current when emitter is open. This is same as reverse saturation current in ideal but have slight difference in practical.