Question: For the circuit shown below: AC input = 1 2 0 V m s , 6 0 H z . Transformer Ratio = 1 2

For the circuit shown below:
AC input =120Vms,60Hz. Transformer Ratio =12:1. Reference Voltage =8.7V.R load =51 Ohms. Ambient temperature =60 degrees C Transistor is a TIP31. There is no heatsink on the transistor.
Refer to Figure 1. Power Derating, in the TIP31 data sheet. Based on the TA curve, what percentage of the allowable TA power at 60 degrees C is the transistor dissipating?
A
For the circuit shown below: AC input = 1 2 0 V m

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