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GATE ECE 1995 | Question-55

A power amplifiers delivers $50 \mathrm{~W}$ output at $50 \%$ efficiency. The ambient temperature is $25^{\circ} \mathrm{C}$. If the maximum allowable junction temperature is $150^{\circ} \mathrm{C}$, then the maximum thermal resistance $\phi_{j c}$ that can be tolerated is $\dots$

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