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Standard XII

Physics

Coupling

A triode has ...

Question

A triode has a plate resistance of 10 $k Ω$ and amplification factor 24 . If the input signal voltage is 0.4 $V (r . m . s)$ , and the load resistance is $10 k Ω,$ then, the output voltage(r.m.s.) is

4.8 V

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9.6 V

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12.0 V

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none of these

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Solution

The correct option is A $4.8 V$
The voltage gain by a triode is-
$V^{'} = ⎛ ⎜ ⎝ \frac{μ}{1 + \frac{R_{p}}{R_{L}}} ⎞ ⎟ ⎠ \times V$
We put the values-
$V^{'} = ⎛ ⎝ \frac{24}{1 + \frac{(10 k Ω)}{(10 k Ω)}} ⎞ ⎠ \times (0.4 Volt)$
$V^{'} = (\frac{24}{1 + 1}) \times 0.4 = 12 \times 0.4 = 4.8 Volt$

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A triode has a plate resistance of 10kΩ and amplification factor 24 . If the input signal voltage is 0.4V(r.m.s) , and the load resistance is 10kΩ, then, the output voltage(r.m.s.) is

The correct option is A 4.8VThe voltage gain by a triode is-V′=⎛⎜⎝μ1+RpRL⎞⎟⎠×VWe put the values-V′=⎛⎝241+(10kΩ)(10kΩ)⎞⎠×(0.4 Volt)V′=(241+1)×0.4=12×0.4=4.8 Volt

A triode has a plate resistance of 10 $k Ω$ and amplification factor 24 . If the input signal voltage is 0.4 $V (r . m . s)$ , and the load resistance is $10 k Ω,$ then, the output voltage(r.m.s.) is