a certain transistor has collector current of 10 mA and a base current 40 uA. what is the current gain of the transistor
Correct answer: B. 250
- A. 150
- B. 250
- C. 300
- D. none
Explanation
The current gain of a transistor, also known as beta (β), is calculated by dividing the collector current (Ic) by the base current (Ib):β = Ic / IbGiven:Collector current (Ic) = 10 mA (milliamperes) = 0.01 A (amperes)Base current (Ib) = 40 μA (microamperes) = 40 x 10^-6 APlugging the values into the formula:β = 0.01 A / 40 x 10^-6 Aβ ≈ 250
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A PN junction forms when p type and n type semiconductor regions meet, creating a depletion layer and a potential barrier. The topic covers forward and reverse bias, diode current voltage characteristics, breakdown and rectification, while distinguishing an ordinary junction diode from a transistor formed from multiple junctions.
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