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2018年AP物理2真题解析(FR)

2018/7/18 17:41:52    上海新航道学校

摘要:

      备考AP的同学们,福利来了,上海新航道AP小编为大家带来了,2018年AP物理2真题解析.

      Directions: Questions I and 4 are short free-response questions that require about 20 minutes each to answer and are

worth 10 points each. Questions 2 and 3 are long free-response questions that require about 25 minutes each to
nswer and are worth 12 points each. Show your work for each part in the space provided after that part

1.(10 points, suggested time 20 minutes)

The figures above show a rectangular conducting loop at three instants in time. The loop moves at a constant
speed v into and through a region of constant, uniform magnetic ficld B directed into the page. The magnetic
field is zero outside the region.

(a) In a coherent paragraph-length response. compare the magnitude and direction of the current at times t1,t2
and t3 Include an explanation of why there is or is not a current and the direction of the current if one is

prevent. Use fundamental phy sics concepts and principles in your explanati


a)t、t2时的电流方向均为逆时针方向,大小相等,t3时没有感应电流。电流方向由右手定
则判断,电流大小可由公式E=Blv计算出感应电动势后得出。



质子运动轨迹向上呈圆形弯曲,并标记为P1
.
第二个质子的运动轨迹半径比第一个轨迹半径要大一些,向上呈圆形弯曲,并标记P2


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