A class – A transformer coupled, transistor power amplifier is required to deliver a power output of 10 watts. The maximum power rating of the transistor should not be less than __________.

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SSC JE EE Previous Year Paper 16 (Held On: 3 March 2017 Morning)
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  1. 5 W
  2. 10 W
  3. 20 W
  4. 40 W

Answer (Detailed Solution Below)

Option 3 : 20 W
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Efficiency of transformer coupled class A power amplifier is maximum of 50%.

So 10 W is the coupled power.

For max power let’s assume the efficiency to be 100%

Hence the power is 20 W.
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