a 1m long resistance wire ,an ammeter and a 2.0v cell are connected in series (the ammeter and the cell have negligible resistance) the ammeter reads 0.50A,calculate,the resistance of the wire?b)the resistance wire is replaced by a 1m long wire of the same material but twice the cross- sectional area ,what is ,i) the resistance of this wire?ii)what is the new ammeters reading?
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Expert's answer
2018-08-22T11:43:08-0400
R=U/I=2.0/0.50=4 Ω
b) the resistance wire is replaced by a 1m long wire of the same material but twice the cross- sectional area ,what is , i) the resistance of this wire?
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