Semiconductor Electronics Materials Devices and Simple Circuits - Result Question 75

«««< HEAD:content/english/neet-pyq-chapterwise/physics/semiconductor-electronics-materials-devices-and-simple-circuits/semiconductor-electronics-materials-devices-and-simple-circuits-result-question-75.md

77. In the case of a common emitter transistor amplifier, the ratio of the collector current to the emitter current $I_c / I_e$ is 0.96 . The current gain of the amplifier is

======= ####77. In the case of a common emitter transistor amplifier, the ratio of the collector current to the emitter current $I_c / I_e$ is 0.96 . The current gain of the amplifier is

3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed:content/english/neet-pyq-chapterwise/physics/semiconductor-electronics-materials-devices-and-simple-circuits/semiconductor-electronics-materials-devices-and-simple-circuits—result-question-75.md (a) 6

(b) 48

(c) 24

(d) 12

[2002]

Show Answer

Answer:

Correct Answer: 77. (c)

Solution:

  1. (c) $\frac{I_c}{I_e}=0.96$

$\Rightarrow I_c=0.96 I_e$ But $I_e=I_c+I_b=0.96 I_e+I_b$

$\Rightarrow I_b=0.04 I_e$

$\therefore$ Current gain, $\beta=\frac{I_c}{I_b}=\frac{0.96 I_e}{0.04 I_e}=24$