Electric Conductivity MCQ - Practice Questions with Answers

In presence of interspace charge, at a plate voltage of , the current is . Then the current in mA at will be

Following is the relation between current and charge $\mathrm{I}={\mathrm{AT}}^2{\mathrm{e}}^{\mathrm{q}/{\mathrm{V}}_{\mathrm{L}}}$, then value of ${\mathrm{V}}_{\mathrm{L}}$ will be

In a triode valve, the amplification factor is  and mutual conductance is . The plate resistance is

If in a triode valve amplification factor is  and plate resistance is , then its mutual conductance is

If , then on increasing plate voltage by , how much the grid voltage is changed so that plate current remains the same?

The value of current in a triode valve is given by  . When plate potential and grid potential are and respectively, then the value of mutual conductance will be:

The amplification factor of a triode valve is . If the grid voltage is changed by volt the change in plate voltage in order to keep the plate current constant (in volt) is

For a thermionic emitter (metallic) if J represents the current density and T is its absolute temperature then the correct curve between ${\log }_{\mathrm{e}}\frac{\mathrm{J}}{{\mathrm{T}}^2}$ and $\frac{1}{\mathrm{T}}$ is

In a triode amplifier, and load resistance . If the input signal voltage is , then the output signal voltage will be

Mutual conductance of the triode is and the amplification factor is . Its anode is connected with a source of and a resistance of . The voltage gain of this amplifier is