A) zero
B) \[\frac{\pi }{4}\]
C) \[\frac{\pi }{2}\]
D) \[\pi \]
Correct Answer: D
Solution :
In a triode valve, the phase difference between input and output voltage is \[\pi \] or \[\text{18}{{\text{0}}^{\text{o}}}.\] This is called phase-reversal property of triode valve.
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