Advertisements
Advertisements
Question
The plate current in a triode value is maximum when the potential of the grid is ______________ .
Options
positive
zero
negative
non-positive
Advertisements
Solution
positive
If the grid voltage is made positive, it will help the electrons move towards the anode, which will help in increasing the current. Thus, the plate current in the triode value is maximum when the potential of the grid is positive.
APPEARS IN
RELATED QUESTIONS
A triode is operated in the linear region of its characteristics. If the plate voltage is slightly increased, the dynamic plate resistance will __________ .
Electric conduction takes place in a discharge tube due to the movement of _____________ .
(a) positive ions
(b) negative ions
(c) electrons
(d) protons
The plate current in a diode is zero. It is possible that _____________ .
(a) the plate voltage is zero
(b) the plate voltage is slightly negative
(c) the plate voltage is slightly positive
(d) the temperature of the filament is low
The plate current in a triode valve is zero. The temperature of the filament is high. It is possible that ____________ .
(a) Vg > 0, Vp > 0
(b) Vg > 0, Vp < 0
(c) Vg < 0, Vp > 0
(d) Vg < 0, Vp < 0
The plate current in a triode can be written as \[i_p = k \left( V_g + \frac{V_p}{\mu} \right)^{3/2}\] Show that the mutual conductance is proportional to the cube root of the plate current.
What are the basic building blocks of electronic circuits?
Before the discovery of the transistor in 1948, which devices were mainly used to obtain a controlled flow of electrons?
Which set consists entirely of types of vacuum tube devices?
Which electrodes are present in a triode?
How many electrodes does a tetrode have?
How is the controlled flow of electrons in a vacuum tube obtained?
In which direction can electrons flow in a vacuum tube device?
What operating voltage is generally associated with vacuum tube devices?
Which simple excitations can change the number of mobile charges in a semiconductor?
What was a naturally occurring crystal of galena with a metal point contact attached to it used for?
Galena is also called which material?
