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54. Determine what maximum dissipation will be allowed for a 70-W silicon transistor (rated at 25ºC) if derating is required above 25ºC by a derating factor of 0.6 W/ºC at a case temperature of 100º.
(a) 25 W
(b) 30 W
(c) 35 W
(d) 40 W
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