Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • Medical
  • With a change of load resistance of a triode, used as an amplifier, from <img alt="\mathrm{50\: kilo\: ohms\: to\: 100\: kilo\: ohm}" src="https://entrancecorner.oncodecogs.com/gif.latex?%5Cmathrm%

With a change of load resistance of a triode, used as an amplifier, from \mathrm{50\: kilo\: ohms\: to\: 100\: kilo\: ohm} , its voltage amplification changes from \mathrm{25\: to\: 30}. Plate resistance of the triode is
 

Option: 1

\mathrm{25\: K\Omega}


Option: 2

\mathrm{75\: K\Omega}


Option: 3

\mathrm{7.5\: K\Omega}


Option: 4

\mathrm{2.5\: K\Omega}


Answers (1)

best_answer

Voltage amplification \mathrm{A_v=\frac{\mu}{1+\frac{{ }^F}{R_L}}}

\mathrm{ \Rightarrow 25=\frac{\mu}{1+\frac{r_p}{50 \times 10^3}} }      ....(i)

\mathrm{ \text { and } 30=\frac{\mu}{1+\frac{r_p}{100 \times 10^3}}}   .........(ii)

On solving equations (i) and (ii), \mathrm{r_p=25 k \Omega}

Hence option 1 is correct.

Posted by

Irshad Anwar

View full answer

NEET 2024 Most scoring concepts

    Just Study 32% of the NEET syllabus and Score up to 100% marks

Similar Questions

Trending Articles/News

anam-khan

Abolish NEET, restore state CET; Karnataka urges Centre after paper leak row
anam-khan

NEET UG 'Leak': CBI probing role of NTA-linked public servant
anam-khan

NEET Paper Leak: Siddaramaiah backs Rahul Gandhi; seeks Dharmendra Pradhan’s removal

Latest Question