MCQ
The introduction of a grid in a triode valve affects plate current by
  • A
    Making the thermionic emission easier at low temperature
  • B
    Releasing more electrons from the plate
  • C
    By increasing plate voltage
  • By neutralising space charge

Answer

Correct option: D.
By neutralising space charge
By neutralising space charge

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

Similar questions

Two insulated metallic spheres of 3 μF and 5 μF capacitances are charged to 300 V and 500V respectively. The energy loss, when they are connected by a wire is
A telescope has an objective lens of focal length $150\,\,cm$ and an eyepiece of focal length $5 \,\,cm.$ If a $50\,\,m$ tall tower at a distance of $1\,\,km$ is observed through this telescope in normal setting, the angle formed by the image of the tower is $\theta $, then $\theta $ is close to.....$^o$
In compound microscope, the focal length of the objective and eye lens are $2.5\, cm$ and $5\,cm$ respectively. An object is at $3.75\, cm$ before the objective and image is formed at the least distance of distinct vision, then the distance between two lenses will be.......$cm$ (i.e. length of the microscope tube)
The length of the optical path of two media in contact of length ${d_1}$ and ${d_2}$ of refractive indices ${\mu _1}$ and ${\mu _2}$ respectively, is
A parallel $-$ plate capacitor has plates of unequal area. The larger plate is connected to the positive terminal of the battery and the smaller plate to its negative terminal. Let $Q_+$ and $Q_-$ be the charges appearing on the positive and negative plates respectively :
The force between the plates of a parallel plate capacitor of capacitance $C$ and distance of separation of the plates $d$ with a potential difference $V$ between the plates, is
For which regions is Gauss' law true?
The resistance of a galvanometer is $50 \Omega$ and the current required to give full scale deflection is $100 \mu A$. In order to convert it into an ammeter for reading up to $10 A $, it is necessary to put a resistance of
A wire loop is rotated in a uniform magnetic field about an axis perpendicular to the field. The direction of the current induced in the loop reverse once each.
A current carrying solenoid is approaching a conducting loop as shown in the figure. The direction of induced current as observed by an observer on the other side of the loop will be