Analog Electronics
Why holes are not created in a metal ?

 The forbidden band is missing
None of these
 Both 1 & 2
 The conduction band and valance band are overlapped

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Analog Electronics
In an OP-amp differentiator

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

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