In a triode valve,the amplification factor is $20$ and the mutual conductance is $10^{-3} \text{ mho}$. The plate resistance is:

  • A
    $2 \times 10^{3} \ \Omega$
  • B
    $4 \times 10^{3} \ \Omega$
  • C
    $2 \times 10^{4} \ \Omega$
  • D
    $2 \times 10^{5} \ \Omega$

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