How Is the Total Number of Charge Carriers in a Conductor Calculated?

[manimaran1605]

Homework Statement

Let L be the length of the conductor having uniform cross-section area A and density, let I be the current passing through the conductor. How the total number of positive charge carriers in the conductor of length L is (nAL)?

 

[Jilang]

n is just a given constant so naL is just a given too. Do not worry about it. It is just a density times a volume.

 

[rude man]

Homework Statement

Let L be the length of the conductor having uniform cross-section area A and density, let I be the current passing through the conductor. How the total number of positive charge carriers in the conductor of length L is (nAL)?

n is the volume density of carriers. In other words, there are n carriers per cubic meter if you're using SI units. Your wire volume is AL. So the number of carriers = number per cubic meter n times volume of the wire AL, or there is a total of nAL carriers in the wire.