一、单选题 1.如图甲所示的闭合圆环面积100厘米~2,电阻为0.1欧,垂直环面的匀强磁场按图乙示规律变化,则a→b过程中,环中感生电流的方向和通过的电量为:[ ] A.逆时针、0.01库; B逆时针、0.02库; First, the single choice questions 1. As shown in Figure A closed ring area 100 cm ~ 2, the resistance is 0.1 ohms, the vertical ring of uniform magnetic field changes according to the rules shown in Figure B, a → b process, the ring The direction of the induced current and the amount of electricity passed: [A] counterclockwise, 0.01 bank; B counterclockwise, 0.02 bank;