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MCQ Solution:
  If Rp= 7 k. and gm = 2.5 mili mho, how much the grid voltage must be changed when plate voltage is changed by 50 Volt, in order to keep plate current constant:

(1) + 2 Volt                 (2) – 4 Volt

(3) + 4 Volt                 (4) – 3 Volt

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