# A copper wire contains 3.0 *10 ^ 22 number of charges on 1 meter wire

amizy9990
Homework Statement:
A copper wire contains 3.0 *10 ^ 22 number of charges on 1 meter wire. What speed do the electrons move
Relevant Equations:
t=Q/I
A copper wire contains 3.0 *10 ^ 22 number of charges on 1 meter wire. What speed do the electrons move when there is 2 A current in the wire.

t=q/t=3,20*10^3 C/ 2.0 A = 1,5*10^22 s

v= 1m/1,5*10^3s= 6,6*10^-4 m/s

Homework Helper
Hello @amizy9990 , !​

• amizy9990
amizy9990
this is the question: A copper wire contains 3.0 *10 ^ 22 number of charges on 1 meter wire. What speed do the electrons move when there is 2 A current in the wire.

Homework Helper
No, that is the question the exercise asks of you.
What is your question to PF ?

Homework Helper
Suppose the electrons have a speed of v m/s.
In that case, what would be the charge that leaves the wire every second ?

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(*) the idea is that PF helps you to complete the exercise, not that PF does the exercise for you -- that would not help you at all.

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amizy9990
the charge is I=2,0A

Homework Helper
No. 2A is not a charge.
I asked: how much charge leaves (goes through) the wire every second IF the speed is 1 m/s ?

That would be a charge of 3 10^22 electrons. How many Coulombs is that?

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Homework Helper
Gold Member
2022 Award
t=q/t=3,20*10^3 C/ 2.0 A = 1,5*10^22 s

v= 1m/1,5*10^3s= 6,6*10^-4 m/s
Basically right, but some confusing typos and numerical errors.
q/t should be q/I
3,2 should be 4,8
If it were 3,2, 1,5 should be 1,6.
10^22 should be 10^3.

• amizy9990
amizy9990
thanks

• berkeman