The current in a triode at anode potential 100 ,V and grid potent… - Vidyadip

MCQ

The current in a triode at anode potential $100\,V$ and grid potential $-1.2 \,V is 7.5 \,mA$. If grid potential is changed to $ -2.2\, V$, the current becomes $5.5\, mA$. the value of trans conductance (gm) will be....$mili\, mho$

✓
$2$
B
$3$
C
$4$
D
$0.2$

✓

Answer

Correct option: A.

$2$

a
(a)${g_m} = {\left( {\frac{{\Delta {I_p}}}{{\Delta {V_g}}}} \right)_{{V_p} = {\rm{constant}}}} = \frac{{(7.5 - 5.5)}}{{ - 1.2 - ( - 2.2)}} = 2m\,mho$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 14. Semicondutor electronics→14. Semicondutor electronics — all question types→Physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

Function of rectifier is

If a number of sine waves with modulation indices $n_1, n_2, n_3 ........$ modulate a carrier wave, then total modulation index $(n)$ of the wave is

Light waves travel in vacuum along the $X-$axis. Which of the following may represent the wavefronts?

$AB$ and $CD$ are long straight conductor, distance $d$ apart, carrying a current $I$. The magnetic field at the midpoint of $BC$ is

Figure given below shows a beam of light converging at point P. When a convex lens of focal length 16 cm is introduced in the path of the beam at a place O shown by dotted line such that OP becomes the axis of the lens, the beam converges at a distance x from the lens. The value x will be equal to

The figure below shows currents in a part of electric circuit. The current i is

A monochromatic beam of light enters a square enclosure with mirrored interior surfaces at an angle of incidence $\theta_i(\neq 0)$ (see figure). For some value(s) of $\theta_i$, the beam is reflected by every mirrored wall (other than the one with the opening) exactly once and exits the enclosure through the same hole. Which of the following statements about this beam is correct?

When the rectangular metal tank is filled to the top with an unknown liquid, as observer with eyes level with the top of the tank can just see the corner $E$; a ray that refracts towards the observer at the top surface of the liquid is shown. The refractive index of the liquid will be

According to the quantum theory, a photon of electromagnetic radiation of frequency $v$ has energy $E=h v$, where $h$ is known as Planck's constant. According to the theory of relativity, a particle of mass $m$ has equivalent energy $E=m c^2$, where $c$ is speed of light. Thus, a photon can be treated as a particle having effective mass $m=\frac{h v}{c^2}$ If a flash of light is sent horizontally in earth's gravitational field, then photons while travelling a horizontal distance $d$ would fall through a distance given by

Which of the following represents an infrared wavelength