Current and Resistivity Concepts1. Electric charge is conserved. As a consequence, when current arrives at a junction of wires, the charges can take either of two paths out of the junction and the numerical sum of the currents in the two paths equals the current that entered the junction. Thus, current is which of the following? a) a scalarb) a vector c) neither a vector nor a scalar2. A cylindrical wire has a radius r and length l. If both r and l are doubled, the resistance of the wire does what? a) decreasesb) increases c) remains the same
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