1.单选题- (共7题)


A.根据磁感应强度定义![]() |
B.磁感应强度B是标量,没有方向,磁感线密集的地方磁感应强度B大些,磁感线稀疏的地方磁感应强度B小些 |
C.磁感应强度B是矢量,方向与安培力F的方向相反 |
D.在确定的磁场中,同一点的磁感应强度B是确定的,不同点的磁感应强度B可能不同 |





A.当![]() |
B.电流方向均为从![]() ![]() |
C.当![]() ![]() ![]() |
D.当![]() ![]() ![]() |






A.反映输出功率![]() |
B.电源电动势为4 V |
C.电源内阻为![]() |
D.反映![]() |





A.串联一个![]() ![]() |
B.并联一个![]() ![]() |
C.串联一个![]() ![]() |
D.并联一个![]() ![]() |





A.F | B.![]() | C.![]() | D.![]() |






A.E点的电势与C点的电势相等 | B.![]() ![]() |
C.电场强度的大小为![]() ![]() | D.电场强度的大小为![]() ![]() |

A.q1、q2为等量异种电荷 |
B.N、C两点间场强方向沿x轴负方向 |
C.N、D两点间的电场强度大小沿x轴正方向先减小后增大 |
D.将一正点电荷从N点移到D点,电势能先增大后减小 |
2.选择题- (共1题)
用括号内所给词的适当形式填空
⑴I enjoy reading this kind of {#blank#}1{#/blank#} magazine. (每周)
⑵It is good for your health to {#blank#}2{#/blank#} deeply. (呼吸)
⑶It {#blank#}3{#/blank#} on the two sides of the river.(位于)
⑷A large number of new {#blank#}4{#/blank#} will live in Yangzhou.(移居者)
⑸The small town is becoming more and more {#blank#}5{#/blank#} and polluted.(拥挤的)
⑹His mother has devoted{#blank#}6{#/blank#} to the teaching of Home Economics.(she)
⑺The making paper was a Chinese{#blank#}7{#/blank#} . (invent)
⑻It is well {#blank#}8{#/blank#} that Yangzhou is one of the most beautiful cities in our country.(know)
⑼He had been deeply affected by the{#blank#}9{#/blank#} death of his father. (suddenly)
⑽There will be {#blank#}10{#/blank#} no rain tomorrow.(probable)
3.多选题- (共1题)





A.电子在a点动能较小 | B.电子在b点动能较小 |
C.a点的场强大于b点的场强 | D.a点电势低于b点电势 |
4.解答题- (共3题)























(1)当调节滑动变阻器R的阻值为3Ω时,金属棒静止,求此时的摩擦力的大小和方向?
(2)当调节滑动变阻器R的阻值在什么范围内时,可使金属棒静止在框架上?(框架与金属棒的电阻不计,g取10m/s2)
5.实验题- (共1题)
-
【1】题量占比
单选题:(7道)
选择题:(1道)
多选题:(1道)
解答题:(3道)
实验题:(1道)
-
【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:1
5星难题:0
6星难题:7
7星难题:0
8星难题:3
9星难题:1