diode is active or passive and why?

Answer Posted / prashant sharma

device which are capable of controlling electrical flow by the use of other electrical quantity(current or voltage)are called active device.
also actice devices have property of giving direction to electric flow and amplify the signal....
Thus, diode in not a active device(its a passive one) since
1)no external supply is provided for the electric flow control
2)do not amplify the signal...

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