Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12
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# 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 Amplification Factor. - Physics

ConceptSemiconductor Diode

#### Question

A triode value operates at Vp = 225 V and Vg = −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 amplification factor.

#### Solution

Amplification factor for a triode valve,

$\mu = \frac{\text{Change in Plate Voltage}}{\text{Change in Grid Voltage}}$

At constant plate current,

$\mu = \left(\frac{\delta V_P}{\delta V_G}\right)_{i_P = constant}$

$\mu = \frac{250 - 225}{2 . 5 - 0 . 5}$

$\mu = \frac{25}{2} = 12 . 5$

This implies that the amplification factor of the triode is 12.5

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Solution 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 Amplification Factor. Concept: Semiconductor Diode.
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