JEE PYQ: Semiconductors Question 9
Question 9 - 2021 (24 Feb 2021 Shift 2)
Given below are two statements: Statement I: PN junction diodes can be used to function as transistor, simply by connecting two diodes, back to back, which acts as the base terminal. Statement II: In the study of transistor, the amplification factor $\beta$ indicates ratio of the collector current to the base current.
(1) Statement I is false but Statement II is true
(2) Both Statement I and Statement II are true
(3) Statement I is true but Statement II is false
(4) Both Statement I and Statement II are false
Show Answer
Answer: (1)
Solution
Statement I is false — two back-to-back diodes have four doped regions and no thin base. Statement II is true: $\beta = I_C/I_B$.
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