A triode has a plate resistance of 8 k and a transconductance of 2.5 millimho . Determine the increase in the plate current if the plate voltage is raised by 48 V while the grid voltage is held constant.

Step-by-step solution

The plate resistance of a triode is defined as the ratio of change in plate voltage to the change in plate current at a constant grid voltage: r_p = ( V_p I_p )_ V_g = 0 Rearranging the formula to find the change in plate current: I_p = V_p r_p Given that the increase in plate voltage is V_p = 48 V and the plate resistance is r_p = 8 k = 8 10^3 , , substituting these values yields: I_p = 48 8 10^3 I_p = 6 10⁻³ A = 6 mA Since the grid voltage is held constant, the transconductance ( g_m ) is not required for this ca