MCQ
A triode whose mutual conductance is $2.5 m$$ A/volt$ and anode resistance is $20 kilo ohm$, is used as an amplifier whose amplification is $10$. The resistance connected in plate circuit will be.....$k\Omega$
- A$1 $
- ✓$5$
- C$10$
- D$20 $
✓
Answer
Correct option: B.
$5$
b
(b)$\mu = {r_P} \times {g_m} = 20 \times 2.5 = 50$
From $A = \frac{{\mu \,{R_L}}}{{{r_P} + {R_L}}}$==> ${r_P} + {R_L} = \frac{{\mu \,{R_L}}}{A} = \frac{{50{R_L}}}{{10}} = 5{R_L}$
==> $4{R_L} = {r_p} \Rightarrow {R_L} = \frac{{{r_p}}}{4} = \frac{{20}}{4} = 5k\Omega $
(b)$\mu = {r_P} \times {g_m} = 20 \times 2.5 = 50$
From $A = \frac{{\mu \,{R_L}}}{{{r_P} + {R_L}}}$==> ${r_P} + {R_L} = \frac{{\mu \,{R_L}}}{A} = \frac{{50{R_L}}}{{10}} = 5{R_L}$
==> $4{R_L} = {r_p} \Rightarrow {R_L} = \frac{{{r_p}}}{4} = \frac{{20}}{4} = 5k\Omega $
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of the following statements is correct for diamagnetic materials
Which among the following cannot be the charge of a charged body?
The transistor are usually made of:
The current flowing in a coil of resistance $90 \,\Omega$ is to be reduced by $90\%$. What value of resistance should be connected in parallel with it ............. $\Omega $
→A bar magnet of magnetic moment $1.5\,A \times m^2$ lies aligned with the direction of a uniform magnetic field of $2\,Tesla$. What is the amount of work required to turn the magnet so as to align itsmagnetic moment normal to the field direction....$J$
→For a concave lens of focal length $f$, the relation between object and image distance $u$ and $v,$ respectively, from its pole can best be represented by $( u = v$ is the reference line):
→In a transistor
In a certain region of space, variation of potential with distance from origin as we move along $x$-axis is given by $V=8 x^2+2$, where $x$ is the $x$-coordinate of a point in space. The magnitude of electric field at a point $(-4,0)$ is .......... $V / m$
→The force between unlike charges is:
In a Young's double slit experiment, two slits are illuminated with a light of wavelength $800 nm$. The line joining $A _1 P$ is perpendicular to $A _1 A _2$ as shown in the figure. If the first minimum is detected at $P$, the value of slits separation ' $a$ ' will be $.........\,mm$
→The distance of screen from slits $D =5\,cm$