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Amplifiers – 2 – 3

61. Decibel is defined in terms of :

(a) Voltage ratio
(b) Current ratio
(c) Power ratio
(d) Any of the above

ANSWER

EXPLANATION

62. An amplifiers power is changed from 10 watts to 20 watts. The equivalent AB gain will be :

(a) 2 dB
(b) 3 dB
(c) 6 dB
(d) 10 dB

ANSWER

EXPLANATION

63. A push pull amplifier balances out :

(a) Odd harmonics
(b) Even harmonics
(c) Both a and b
(d) None of these

ANSWER

EXPLANATION

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