The current gain of a transistor having a collector current of 10 mA and a base current of 40 A is:
Correct answer: C. 250
- A. 2.5
- B. 25
- C. 250
- D. 2500
Explanation
Current gain is the ratio of the change in the collector current to the change in the emitter current in a transistor. Mathematically α=△Ic/△Ie. Current gain = 1X10 -3 / 4X10 -6 =250
Last updated
About PN Junction
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.
Practise Electronics
660 free Electronics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
a certain transistor has collector current of 10 mA and a base current 40 uA. what is the current gain of the transistor
A light emitting diode (LED) emits light only when it isI. unbiasedII. reverse biasedIII. forward biased
A light emitting diode produces light when
A logic gate has four inputs. Its possible input combinations will be:
A n-type semiconductor is formed in an extrinsic semiconductor when