Answer / tirumala

for an amplifier the gain is very high.(eg:for open loop op-
amp the gain is about 20,000) so it is convinent to express
it in decibels to draw the response of thaton a graph paper
rather than linear

Answer / sumit

for expressing high gain we use instead of linear scale.
i.e. log(a/b) and it's unit in bel or 10log(a/b) and unit in db.

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Susan made a block with small cubes of 8 cubic cm volume to make a block ,3 small cubes long, 9 small cubes wide and 5 small cubes deep. She realizes that she has used more small cubes than she really needed. She realized that she could have glued a fewer number of cubes together to lock like a block with same dimensions, if it were made hollow. What is the minimum number of cubes that she needs to make the block? a) 114 b) 135 c) 21 d) 71

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