Current Carrying Wires with Different Resistances-Net Charge7 Shown below are si

Question

Current Carrying Wires with Different Resistances-Net Charge7 Shown below are six segments of wires that are carrying electric currents. All of these segments have the same length and the same diameter, but the wires are made of different materials so they have different resistances, The currents flowing in these segments also vary. Specific values for each of these properties are given in the figures. Rank these situations from greatest to smallest on the basis of the net electric charge on each segment, i.e., on the basis of the difference between the number of positive and negative charges in the wire segment. Put first the situation that has the greatest net charge, and put last the situation with the smallest net charge, i.e., the smallest difference between the number of positive and negative charges. 7 A I 4 A R 3 2 1-4 A |-?? Greatest 2 4 Smallest Or, all of these segments have the same net charge. Or, all of these segments have zero net charge. Please carefully explain your reasoning. Approximate value:

Explanation / Answer

Electric current is the flow of free electrons in a current carrying conductor. Suppose a battery is supplying the currents to these conductors. Then at any instant, the number of electrons leaving the wire segment is equal to the number of electrons flowing from the battery into it. Hence, the net charge on the wire segments is zero.

Hence all of these segments have zero net charge.

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