The power delivered in the plate circuit of a diode is 1.0 W when the plate voltage is 36 V. Find the power delivered if the plate voltage is increased to 49 V. Assume Langmuir – Child equation to hold.


Given P1=1 W, VP1= 36 V, VP2= 49 V

We know,


According to Langmuir-Child equation


where ip is the plate current and Vp is the plate voltage


Now,



∴=.04411×49=2.16


W=2.2 W


1
1