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Question

Question: For a triode, at \(V_{g} = - 1\) volt, the following observations were taken \(V_{p} = 75V,I_{p} = 2...

For a triode, at Vg=1V_{g} = - 1 volt, the following observations were taken Vp=75V,Ip=2mAV_{p} = 75V,I_{p} = 2mA,

Vp=100V,Ip=4mAV_{p} = 100V,I_{p} = 4mA. The value of plate resistance will be.

A

25 kΩ

B

20.8 kΩ

C

12.5 kΩ

D

100 kΩ

Answer

12.5 kΩ

Explanation

Solution

rp=Vp1Vp2Ip1IP2=75100(24)×103r_{p} = \frac{V_{p_{1}} - V_{p_{2}}}{I_{p_{1}} - I_{P_{2}}} = \frac{75 - 100}{(2 - 4) \times 10^{- 3}}=12.5 × 103Ω =12.5kΩ.