In transistors, the base region is very thin of the order of:
Correct answer: B. 10-6 m
- A. 10-5 cm
- B. 10-6 m
- C. 10-6 mm
- D. 10-6 µm
Explanation
The base region in a transistor is the central area that is lightly doped compared to the emitter and collector regions. It is designed to be very thin, typically around 10-6 meters or 1 micrometer, to allow efficient electron flow from the emitter to the collector. Option A (10-5 cm) is incorrect because it is too thick. Option C (10-6 mm) is incorrect because it does not match the correct scale. Option D (10-6 µm) is incorrect because it is too thin, as it suggests a thickness of one-millionth of a micrometer, which is not feasible for the base region.
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 15 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