A copper wire and a nickel chromium alloy wire are of the same length and thickness. If they are connected in series in the circuit, which wire has the higher voltage at both ends? Which wire has the most current? Why?

A copper wire and a nickel chromium alloy wire are of the same length and thickness. If they are connected in series in the circuit, which wire has the higher voltage at both ends? Which wire has the most current? Why?

A: because the conductor resistance depends on the length, cross-sectional area and material of the conductor, and the length and cross-sectional area of the two conductors are equal, it can be seen that the resistance of nickel chromium alloy wire is large; when copper wire and nickel chromium alloy wire are connected in series, the current through them is the same, and the partial voltage with large resistance is large, so the voltage at both ends of nickel chromium alloy wire is large

In the diagram, instead of the wire, the stroke line is used to form the parallel circuit of lamp L1 and L2. The switch S is required to control lamp L1 and lamp L2 at the same time. The current through L2 is measured with an ammeter, and the corresponding circuit diagram is drawn

The lamp L1 and L2 form a parallel circuit. The switch s can control the lamp L1 and L2 at the same time. The switch S is connected in series in the main circuit, and the current through L2 is measured with an ammeter. The ammeter is connected in series in the L2 branch. Starting from the negative pole of the power supply, the power supply, switch, ammeter, L2 are connected in series to the circuit, and then return to the negative pole of the power supply