Analog Electronics
In a rectifier circuit, the diode converts

 alternating voltage to direct voltage.
 alternating voltage to direct current.
 both (A) and (C) options are connect.
 alternating current to direct voltage.

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Analog Electronics
In an OP-amp differentiator

The amplitude of output is proportional to input
The amplitude of output is proportional to rate of change of input
Polarity of input and output is the same
Output occurs when input is finite and constant

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