An incandescent lightbulb contains a tungsten filament that reaches a temperature of about 3020 K, roughly half the surface temperature of the Sun.
Part A
Treating the filament as a blackbody, determine the frequency for which its radiation is a maximum.
An incandescent lightbulb contains a tungsten filament that reaches a temperature of about 3020 K
An incandescent lightbulb has a tungsten filament that is heated to a temperature of 3.36 x 103 K when an electric current passes through it. If the surface area of the filament is approximately 0.519 x 10−4 m2 and it has an emissivity of 0.320, what is the power radiated by the bulb?
The filament of a typical incandescent lightbulb is at a temperature of about 3,000 K. For a 100-W lightbulb, what’s the surface area (mm2) of the filament? Assume the entire 100-W goes into radiantly heating the filament (normally, it’s about 95%; the other 5% goes into producing light) and that the filament has an emissivity of one. Please explain the math
Part A: Determine the resistance of the tungsten filament in a 55-W 120-V incandescent lightbulb at its operating temperature of about 2800 KPart B: Determine the resistance of the tungsten filament in this incandescent lightbulb at room temperature (20∘C).I've already solved Part A, it was 260 ohms. I just don't understand Part B.
A standard 100 W (120 V) lightbulb contains a 9.10 cm -long tungsten filament. The high-temperature resistivity of tungsten is 9.0×10−7Ωm. What is the diameter of the filament?
30.The tungsten filament in a typical incandescent light bulb operates at approximately 2800 K. What is the wavelength at the peak of the emitted radiation? (a) 142.8 nm, (b) 474 nm, (c) 561 nm, (d) 1035 nm.
A tungsten filament in an incandescent bulb has the following properties when the bulb has been connected to an ideal 1.5 volt battery for a long time: • temperature = 2800 K • resistivity at this temperature = 8.47E-7 Ωm • length = 0.30 m • diameter = 0.52 mm You may assume that any other parts of the bulb and the wires have no resistance. 1. Determine the resistance of the tungsten filament. 2. Determine the current through the tungsten filament....
The tungsten filament of an incandescent lamp has a resistance of 200 Ohms at room temperature. A) What would the resistance be at an operating temperature of 1600 C? B) Assuming it is plugged into a 120-V outlet, what is its power output when just starting up? C) By how much does its power output change from the room temperature value when it is at its operating temperature?
Review Con: Part A An incandescent light bulb uses a coiled filament of tungsten that is 580 mm long with a diameter of 46.0 um. At 20.0°C tungsten has a resistivity of 5.25 x 1012.m. Its temperature coefficient of resistivity is 0.0045 (Cº) , and this remains accurate even at high temperatures. The temperature of the filament increases linearly with current, from 20°C when no current flows to 2520°C at 1.00 A of current What is the resistance of the...
Use a computer to calculate Planck's radiation law for a temperature of 3000 K, which is the temperature of a typical tungsten filament in an incandescent light bulb. Plot the intensity versus wavelength. (a) How much of the power is in the visible region (400-700nm) compared with the ultraviolet and infrared? (b) What is the ratio of the intensity at 400 nm and 700 nm to the wavelength with maximum intensity?
A cylindrical tungsten filament 14.0 cm long with a diameter of 1.10 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 12.5 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 ) Part A What will be the maximum electric field in this filament?...