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A high gain MESFET packaged device of case-to-channel thermal resistance of...

This question belongs to Electronics And Communications Engineering Analog Electronics
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A high gain MESFET packaged device of case-to-channel thermal resistance of the device is 4.5°C/Watt provides 8W RF output power taking 20W DC power. What will be the channel temperature of the device if the case temperature of the device maintained at 55°C?

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Correct Answer: Option A
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