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, V_{P1}= 36 V, V_{P2}= 49 V

We know,

According to Langmuir-Child equation

where i_{p} is the plate current and V_{p} is the plate voltage

Now,

∴=.04411×49=2.16

W=2.2 W

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