Solving a problem in physics section 45 paragraph 3 el

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3. After the bulb flowing current of 0.6 A. The temperature of the tungsten filament of 0.1 mm diameter is equal to 2200 ° C. Current is applied copper wire 6 mm2. Determine the voltage of the electric field: 1) tungsten (resistivity at 0 ° C ρ0 = 55 m • Nominal temperature coefficient of resistance and = 0,0045 ° C-1); 2) Copper (ρ = 17 nom • m).

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)

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