(2005? Chengdu) The picture shows the physical diagram of Xiao Li's connection in a certain measurement. According to the physical diagram drawing circuit diagram, the correct is (

(1) The voltmeter has a large resistance, which is equivalent to an open circuit. Remove the voltmeter. L 1 and L2 are connected in series, and the switch controls the whole circuit. Connect the power supply, switch, L2 and L 1 in turn.

(2) The voltmeter V 1 and L 1 form a box, and the voltmeter V 1 measures the voltmeter at both ends of L 1; Voltmeter V2 and power supply form a box. Voltmeter V2 measures the voltage across the power supply.

The voltmeter V 1 measures the voltmeter at both ends of L 1, and the voltmeter V2 measures the voltage at both ends of the power supply, but the switch cannot control the voltmeter.

B voltmeter V 1 measures the voltmeter at both ends of L 1, voltmeter V2 measures the voltage at both ends of the power supply, and the switch controls the whole circuit.

C voltmeter V 1 measures the voltmeter at both ends of L 1, and voltmeter V2 measures the voltage at both ends of L2.

D voltmeter V 1 measures the voltmeter at both ends of the measuring power supply, and voltmeter V2 measures the voltage at both ends of L 1.

So choose B.