When burning normally, the temperature of the filament in a 230 V, 150 W gas-filled tungsten lamp is 2,750°C. Assuming a room temperature of 16°C, calculate (a) the normal current taken by the lamp (b) the current taken at the moment of switching on. Temperature coefficient of tungsten is 0.0047 Ω/Ω°C at 0°C.

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A: Given that:  Diameter of wire d = 2.5 mm = 2.5×10-3 m  Length of wire:  l = 2.50 m  Voltage across…

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Q: What current (in A) must be produced by a 12.0 V battery-operated bottle warmer in order to heat…

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Q: 1. Immersion heaters are placed into liquids to warm them up. If 250 g of water in a cup is heated…

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Q: (a) In the figure what value must R have if the current in the circuit is to be 1.5 mA? Take &₁ =…

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Q: A spool of copper wire 290 m long and with a diameter of 0.360 mm is at 20.0°C. For copper, the…

A: The wire's resistivity is, ρ=1.7×10-8 Ω The wire's length is, L=290 m The radius of wire is, r=0.360…

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Q: (a) In the figure what value must R have if the current in the circuit is to be 1.5 mA? Take &1 =…

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Q: What current (in A) must be produced by a 12.0 V battery-operated bottle warmer in order to heat…

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Q: (a) In the figure what value must R have if the current in the circuit is to be 1.3 mA? Take ɛ1 =…

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Q: A TV works properly under the voltage of ΔV = 180 V with power P = 1740 W. (a)  Express the current…

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A: Given data: Mass of gold, m=3.75×10-3kg Time period, t=2.99 h=2.99×3600 s=1.1×104s Known data: One…