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प्रश्न
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
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उत्तर
(b) Vg > 0, Vp < 0
(c) Vg < 0, Vp > 0
(d) Vg < 0, Vp < 0
If the temperature of the filament is high, then it will emit electrons. Other conditions for the plate current in the diode are:
(1) Positive grid voltage, Vg
(2) Positive plate voltage, VP
If any of the above conditions is not satisfied, then plate current in a triode will be zero.
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संबंधित प्रश्न
A triode is operated in the linear region of its characteristics. If the plate voltage is slightly increased, the dynamic plate resistance will __________ .
The plate current in a triode value is maximum when the potential of the grid is ______________ .
Electric conduction takes place in a discharge tube due to the movement of _____________ .
(a) positive ions
(b) negative ions
(c) electrons
(d) protons
Due to the space charge in a diode valve, _____________ .
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.
Which electrodes are present in a vacuum diode?
Which electrodes are present in a triode?
How many electrodes does a tetrode have?
How many electrodes does a pentode have?
What supplies electrons in a vacuum tube?
In which direction can electrons flow in a vacuum tube device?
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?
Which device works on the principle of vacuum tubes and was used in television and computer monitors?
