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Question

A triode valve operates at Vp=225V and VR = -0.5 V.
The plate current remains unchanged if the plate voltage is increased to 250 V and the grid voltage is decreased to - 2.5 V calculate the amplifiation factor.

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Solution

Amplification factor for Triode Valve
μ=Charge in plate voltageCharge in grid voltage=δVpδVg=2502252.50.5=252=12.5 [δVp=250225δVg=2.50.5]


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