Q. 12

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.

Answer :

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


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