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A Transformer coupled class A amplifier has a loudspeaker of 8 Ω connected or across its secondary. The Q point of collector current is 140 mA. The Turns ratio of the transformer is 3:1. If the power delivered to the load is 0.48 W. Then the rms voltage at the primary and efficiency of the transformer is
  • a)
    5.88, 17.14%
  • b)
    5.88 V, 34.29%
  • c)
    1.96 V, 17.14%
  • d)
    1.96 V, 34.29%
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
A Transformer coupled class A amplifier has a loudspeaker of 8 Ω...
Given
PAC(secondary) = 0.48 W
ICQ = 140 mA
RL = 8 Ω
PAC(sec) = PAC(primary)
PAC(primary) = 0.48 W
V1(rms) = 1.96 × 3 = 5.88 V
output DC power
PDC = VCC ICQ
= 10(140 × 10-3)
= 1.4 W
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A Transformer coupled class A amplifier has a loudspeaker of 8 Ω connected or across its secondary. The Q point of collector current is 140 mA. The Turns ratio of the transformer is 3:1. If the power delivered to the load is 0.48 W. Then the rms voltage at the primary and efficiency of the transformer isa)5.88, 17.14%b)5.88 V, 34.29%c)1.96 V, 17.14%d)1.96 V, 34.29%Correct answer is option 'B'. Can you explain this answer?
Question Description
A Transformer coupled class A amplifier has a loudspeaker of 8 Ω connected or across its secondary. The Q point of collector current is 140 mA. The Turns ratio of the transformer is 3:1. If the power delivered to the load is 0.48 W. Then the rms voltage at the primary and efficiency of the transformer isa)5.88, 17.14%b)5.88 V, 34.29%c)1.96 V, 17.14%d)1.96 V, 34.29%Correct answer is option 'B'. Can you explain this answer? for Electronics and Communication Engineering (ECE) 2024 is part of Electronics and Communication Engineering (ECE) preparation. The Question and answers have been prepared according to the Electronics and Communication Engineering (ECE) exam syllabus. Information about A Transformer coupled class A amplifier has a loudspeaker of 8 Ω connected or across its secondary. The Q point of collector current is 140 mA. The Turns ratio of the transformer is 3:1. If the power delivered to the load is 0.48 W. Then the rms voltage at the primary and efficiency of the transformer isa)5.88, 17.14%b)5.88 V, 34.29%c)1.96 V, 17.14%d)1.96 V, 34.29%Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electronics and Communication Engineering (ECE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A Transformer coupled class A amplifier has a loudspeaker of 8 Ω connected or across its secondary. The Q point of collector current is 140 mA. The Turns ratio of the transformer is 3:1. If the power delivered to the load is 0.48 W. Then the rms voltage at the primary and efficiency of the transformer isa)5.88, 17.14%b)5.88 V, 34.29%c)1.96 V, 17.14%d)1.96 V, 34.29%Correct answer is option 'B'. Can you explain this answer?.
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