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In a vaccume diode, when the plate volta...

In a vaccume diode, when the plate voltage is 40 V, the plate current is 10 mA. For a plate voltage of 160 V, the plate current is

A

20 mA

B

40 mA

C

80 mA

D

160 mA

Text Solution

Verified by Experts

The correct Answer is:
C
`V_(p) = 40V, l_(p)=10mA, V^(')_(p) = 160V`
`l_(p)/l^(')p propto((V_(p))^(3)/(2))/(V^('_(p)))^(3/2)`
`10/(l^(')p) = (40/160)^(3/2)`
`l^(')p=(4)^(3/2) xx 10 = 80`mA
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