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What is transconductance formula?

Important Questions on Electron Emission

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Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
The SI unit of transconductance is _____.
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Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
A triode valve operates at plate potential of 200 V and grid voltage of -4.0 V. If the potential is decreased to 150 V, grid potential is increased to -2 V, plate current remains unchanged. Calculate amplification factor.
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Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
The amplification factor of a triode is 10. Its plate current will remain constant if its plate potential is increased by 20 volts and its grid potential 
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Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
Dynamic plate resistance of a triode is 8 kΩ. Find the change in plate current if the plate voltage is changed from 180 V to 220V.
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Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
A triode registers a plate current 5 mA at the plate voltage 150V and grid voltage -2V. If the grid voltage be changed to -3.5V, the plate current falls to 3.2 mA but that can be restored back to 5 mA if the plate voltage is increased to 195V. Find the constants of the triode valve.
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Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
The relation between amplification factorμ, a.c. plate resistancerp and transconductancegm is ____.
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Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
Which of the following is the correct relation between triode constants:
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Physics>Modern Physics>Electron Emission>Triode Constants or Parameters

Represent the union of two sets by Venn diagram for each of the following.

X={x | x is a prime number between 80 and 100}

Y={y | y is an odd number between 90 and 100}

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Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
The slopes of anode and mutual characteristic of a triode value are 0.02 and 1.0 mA/V respectively. Calculate amplification factor.
EASY
Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
Define transconductance. State its units.
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Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
The gain factor of an amplifier is increased from 10 to 12 as the load resistance is changed from 4 kΩ to 8kΩ. Calculate the amplification factor.
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Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
The gain factor of an amplifier is increased from 10 to 12 as the load resistance is changed from 4 kΩ to 8kΩ. Calculate the plate resistance.
EASY
Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
The relation between cutoff grid bias and plate potential is ____.
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Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
The gain factor of an amplifier is increased from 10 to 12 as the load resistance is changed from 4 kΩ to 8 kΩ. Calculate the amplification factor.
MEDIUM
Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
The slopes of anode and mutual characteristics of a triode valve are 0.04mAvolt and 2mAV respectively. The amplification factor of the valve is 
MEDIUM
Physics>Modern Physics>Electron Emission>Triode Constants or Parameters

Correct the following sentence:

The relation between triode constants is μ×gm=rp.

EASY
Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
Cotyledons are also called-
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Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
For a given plate voltage, the plate current in a triode valve is maximum when the potential of 
EASY
Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
Name the constants of a triode and state the relation between them.
HARD
Physics>Modern Physics>Electron Emission>Triode Constants or Parameters
A triode has a mutual conductance of 2 mA/V and a plate resistance of 20 kΩ. Find the load resistance which must be applied to secure a voltage amplification of 20.