The electrical circuits used to get smooth d.c. output from a rectifier circuit is called
A
Filter
B
Amplifier
C
Full wave rectifier
D
Oscillator
[KCET 2000]
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B
Amplifier
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Consider the following statements $A$ and $B$ and identify the correct choice of the given answers$A$ : The width of the depletion layer in a $P-N$ junction diode increases in forwards bias$B$ : In an intrinsic semiconductor the fermi energy level is exactly in the middle of the forbidden gap
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