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A class B push pull power amplifier has an a.c. output of 10 watts. The dc power drawn from the power supply under ideal condition is:
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- 10 watts
- 12.75 watts
- 15 watts
- 20 watts
Correct Option: B
Efficiency of class B push pull amplifier is 78.5%
| η = 78.5% = | ||
| Pi(dc) |
| 0.785 = | ||
| Pi(dc) |
| or Pi (dc) = | = 12.75 Watts. | |
| 0.785 |
