Physics, 06.10.2019 08:00 isabelibarra6370
A580-mm long tungsten wire, with a 0.046-mm-diameter circular cross section, is wrapped around in the shape of a coil and used as a filament in an incandescent light bulb. when the light bulb is connected to a battery, a current of 0.526 a is measured through the filament. (note: tungsten has a resistivity of 4.9 × 10-8 ? • m.) how many electrons pass through this filament in 5 seconds?
what is the resistance of this filament?
what is the voltage of the battery that would produce this current in the filament?
Answers: 1
, so we can calculate the total charge that went through the filament since we know the electric current and the time. If the charge of one electron is e, then the total charge will be given by Q=Ne. Combining these equations we get the number of electrons as:
, then resistance can be calculated using the formula:
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A580-mm long tungsten wire, with a 0.046-mm-diameter circular cross section, is wrapped around in th...
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