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  4. When a triode valve is used as an amplifier the phase difference between input and output voltages is

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Q. When a triode valve is used as an amplifier the phase difference between input and output voltages is

MP PMTMP PMT 2007Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

Triode valve consists of a cathode, grid and anode. When current is passed in the filament by connecting it to a battery, the filament is heated and it heats up the cathode, so electrons start emitting from the cathode.
Anode plate is connected to the positive terminal of a battery. Thus, anode is positive with respect to cathode, electrons being negatively charged get attracted towards anode and a continuous plate current flows. when both grid and anode are positive maximum plate current flows.

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