A current of 25mA flows through a conductor. Calculate the amount of charge passing through any point in the conductor in 10 minutes.
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12th
Physics
Current Electricity
Electric Current
A current of 1· 6 mA flows ...
PHYSICS
A current of 1⋅6 mA flows through a conductor. If charge on an electron is −1.6×10
−19
coulomb, find the number of electrons that will pass each second through the cross section of that conductor.
December 20, 2019
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Narottam Guda
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ANSWER
A current of 1 ampere is said to flow when 1 coulomb of charge passes a given point in 1 sec.
Charge flowing through a conductor in one second is given as charge=current×time. It is given that the current through the conductor is 1.6 mA, that is, 1.6×10
−3
A
Therefore, charge =1.6×10
−3
×1=1.6×10
−3
C.
Number of electrons passing through the conductor in one second is given as
e
Q
=
1.6×10
−19
1.6×10
−3
=10
16
Hence, the number of electrons passing through the conductor in 1 second is 10
16
Answer:
25 *10 = 2500 ......,..