Vacuum diode is a two-electrode vacuum tube, first is called cathode and the second is called

Vacuum diode is a two-electrode vacuum tube, first is called cathode a

1.	Vacuum diode is a two-electrode vacuum tube, first is called cathode and the second is called
A.	symbol
B.	rectifier
C.	anode
D.	none of these
Answer» D. none of these

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Vacuum diode is a two-electrode vacuum tube, first is called cathode and the second is called

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