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Does a thicker wire mean more charge carriers in I = n A q V? Watch

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    If you have two wires A & B made of same material with A being twice as thick as B, when using the formula I = n A q V will the value of n and Q remain the same for both wires or will they change?

    I think because the A wire is more thick it therefore has more valence electrons that can carry charge and therefore the number of charge carriers should increase compared to wire B. But i think i heard someone say that n & q remains constant and only A & V value changes.
 
 
 
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