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If R(p)=7 K Omega g(m) = 2.5 millimho, t...

If `R_(p)=7 K Omega g_(m) = 2.5` millimho, then on increasing plate voltage by 50 V, how much the grid voltage is changed so that plate current remains the same

A

`-2.86 V`

B

`-4 V`

C

`+4V`

D

`+2 V`

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The correct Answer is:
A
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