If α = 0·995, IE = 10 mA and ICO = 0·5 µA, then ICEO

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If α = 0·995, I_E = 10 mA and I_CO = 0·5 µA, then I_CEO will be—

1. 25 µA
2. 100 µA
3. 10·1 µA
4. 10·5 µA

Correct Option: B

Given, α = 0·995, I_E = 10 mA, I_CO = 0·5 µA, I_CEO =?

We know that I_CEO =		1 +	α		I_CO
			1 – α

or I_CEO =		1 +	0.995		x 0.5 µA
			1 - 0.995

=	0·5 µA	= 100 µA
	0·005