Question

两电阻R₁、R₂中的电流I和电压U的关系图线如图所示，可知两电阻的大小之比R₁：R₂等于（   ）

A．1：3

B．3：1

C．1：

D．：1

Answer 1

A

解析试题分析：由I-U图像的斜率是电阻的倒数，得到， ，R₁：R₂=1：3，A对；BCD错。                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
考点：本题考查伏安特性曲线
点评：本题比较简单，能比较I-U 图像和U-I图像的区别。