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(D) In a diode,saturation current occurs when all the electrons emitted by the filament reach the plate. Once saturation is reached,increasing the pla

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The filament current is increased

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(D) In a diode,saturation current occurs when all the electrons emitted by the filament reach the plate. Once saturation is reached,increasing the plate voltage further does not increase the plate current because there are no additional electrons available to be collected. To increase the plate current beyond the saturation point,one must increase the number of electrons emitted per second by the filament. This is achieved by increasing the temperature of the filament,which is done by increasing the filament current. Therefore,the correct option is $D$.

In an experiment,the saturation in the plate current in a diode is observed at $240\,V$. But a student still wants to increase the plate current. It can be done,if

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