[填空题]
A potentiometer with maximum r5 r18hijb7strrfa: f+esi4ed 1rtxc jtixb3/i- .stance $R$ is connected to a 12$V$ cell with negligible internal resistance, a 10$Ω$ resistor, an ideal voltmeter and an ideal ammeter as shown.
The potentiometer value can vary from 00 to 12$Ω$, and $d4 represents the position of the slider.
1.Show that the ammeter reads a current of 0.5 A.I= A
2.(1)Sketch the variation of the reading of the voltmeter with d.
The potentiometer is now connected into the circuit to as shown.
(2)Describe how the readings on the ammeter and voltmeter will change as the distance d is increased.
(3)Compare between the minimum and maximum readings of the voltmeter for both circuits.
(4)Explain how the graph drawn in part b(i) would change with this new configuration.
