what is the solution to these questions? If a current of 78.0 mA exists ina meta
ID: 1677758 • Letter: W
Question
what is the solution to these questions? If a current of 78.0 mA exists ina metal wire, how many electrons flow past a given cross section ofthe wire in 10.5 minutes?electrons A certain conductor has 6.20 x1028 free electrons per cubic meter, across-sectional area of 4.00 x 10-6 m2, andcarries a current of 2.90 A. Find thedrift speed of the electrons in the conductor.
m/s
what is the solution to these questions? If a current of 78.0 mA exists ina metal wire, how many electrons flow past a given cross section ofthe wire in 10.5 minutes?
electrons A certain conductor has 6.20 x1028 free electrons per cubic meter, across-sectional area of 4.00 x 10-6 m2, andcarries a current of 2.90 A. Find thedrift speed of the electrons in the conductor.
m/s
Explanation / Answer
Cureent I = 78 mA = 0.078 A
Time t= 10.5 min = 10.5 * 60 s= 630 s
Charge Q = It
= 49.14 C
No.of electrons N = Q / e
Where e = charge of electron = 1.6 * 10 ^ -19 c
Plug the values we get N = 3.07* 10 ^ 20
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