The filament of a 75-W light bulb is at a temperature of 3,650
K. Assuming the filament has an emissivity e = 0.6, find
its surface area.
The filament of a 75-W light bulb is at a temperature of 3,650 K. Assuming the...
Light bulb 1 operates with a filament temperature of 2600 K, whereas light bulb 2 has a filament temperature of 1900 K. Both filaments have the same emissivity, and both bulbs radiate the same power. Find the ratio A1/A2 of the filament areas of the bulbs.
20. GO Light bulb 1 operates with a filament temperature of 2700 K whereas light bulb 2 has a filament temperature of 2100 K. Both fila ments have the same emissivity, and both bulbs radiate the same power. Find the ratio A/A2 of the filament areas of the bulbs.
Light bulb 1 operates with a filament temperature of 2400 K, whereas light bulb 2 has a filament temperature of 1600 K. Both filaments have the same emissivity, and both bulbs radiate the same power. Find the ratio A1/A2 of the filament areas of the bulbs. A1/A2= Number Units
4) a) What is the current in a 75 W the filament of a light bulb when you tum the light on? Electric sockets supply electricity at about 110 V b) How much charge does flow through the filament during 10.0 second? c) How many electrons pass during this time? d) What is the resistance of the filament? e) What is your monthly payment if you keep the light bulb on for 4 hours every day? The cost of each...
The filament in a light bulb has a diameter of 0.050 mm and an emissivity of 1.0. The temperature of the filament is 3000°C. What should be the length of the filament so it will transfer heat at a rate of 60 J/s (i.e. Watts, W) via radiation? The Stefan-Boltzmann constant is 5.670 × 108 W/m2, K. 11 cm 8.6 cm 9.4 cm 5.9 cm
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
Problem 8.3. The temperature of the tungsten filament in a 100 W light bulb is at 3000 C. Assume it emits as a black body and calculate: 09 (a) the area of the wire. wavelength of the max (c) the fraction emitted in: UV range Visible range 35 m25m Fig. 1 - IR range d) The fraction of energy that is transmitted through the glass window (see Fig.). e) The % of useful visible light produced by the light bulb....
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?
1. The filament of a standard 100-W light bulb has a resistance of about 100 ohms. For this laboratory the glass of the light bulb is unfrosted, so that the filament can be viewed directly. The light bulb is connected to a variable AC voltage source (a Variac), which can deliver up to 140 volts AC. When the voltage is low, about 20 volts, the filament is a dull, red color. When the voltage is high, 100 V, how does...
The filament of a 100 W (120 V) light bulb is a tungsten wire 0.035 mm in diameter. At the filament's operating temperature, the resistivity is 5.0×10−7Ω⋅m. How long is the filament? L=? m