The rated power of a power BJT is PD, rated = 50 W, the maximum allowed junction temperature is Tj, imax = 200 ^o C, and the ambient temperature Tamb = 25 C. The thermal resistance between the heat sink and air is qsnk - amb = 2 ^o C/W, and that between the case and heat sink is q case-snk = 0.5 ^o C/W. Find the maximum safe power dissipation and the temperature of the case.

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