a cylindrical tungsten filament 16.0 cm long with a diameter of 1.20 mm is to be used in a machine for which the temperature will range from room temperature (20 ∘c) up to 120 ∘c. it will carry a current of 12.0 a at all temperatures ( resistivity of tungsten at 20 ∘c is 5.25×10−8ω⋅m , the temperature coefficient of resistivity at 20 ∘c is 0.0045 ∘c−1 )
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a cylindrical tungsten filament 16.0 cm long with a diameter of 1.20 mm is to be used in a machine f...
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