Mass and speed of (current) electrons

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In a direct current circuit with 100 volts and 5 amps supplying a 500-watt bulb, the current indicates that 5 coulombs of charge are transferred per second. Given that one coulomb contains approximately 6.242 x 10^18 electrons, about 3.121 x 10^19 electrons are moving each second. The mass of an electron is approximately 9.11 x 10^-31 kg, leading to a total mass of about 2.84 x 10^-11 kg of electrons in motion per second. The speed of electrons in the wire can be calculated using drift velocity, but the discussion assumes negligible resistance. The calculations demonstrate the relationship between current, charge, and mass in an electrical circuit.
Bjarne
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If a direct current (100 Volt) and (5 Amp.) is supplying a (500 Watt) bulb.
How many electrons (how much mass) are moving and how fast?
 
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Astronuc

I am not a student, but do just need the result.

PS !
The resistance in the wire we can assume to be zero.

KR
Bjarne
 
Last edited:
If have close pipe system with water inside pressurized at P1= 200 000Pa absolute, density 1000kg/m3, wider pipe diameter=2cm, contraction pipe diameter=1.49cm, that is contraction area ratio A1/A2=1.8 a) If water is stationary(pump OFF) and if I drill a hole anywhere at pipe, water will leak out, because pressure(200kPa) inside is higher than atmospheric pressure (101 325Pa). b)If I turn on pump and water start flowing with with v1=10m/s in A1 wider section, from Bernoulli equation I...

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