MHT CET Physics question

The difference in the working of an amplifier and a step up transformer is

(A)amplifier increases the power where as the transformer does notCorrect
(B)amplifier decreases the power where as the transformer increases the power
(C)amplifier keeps the power constant where as the transformer decreases the power
(D)amplifier keeps the power constant where as the transformer increases the power

Answer: (A)

Solution

An amplifier draws energy from its d.c. supply and gives output power greater than the input power,

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Question ID VK-085310