1.选择题- (共5题)
1.根据短文内容填空。
This is Mike's bedroom. It's new and nice. Today Mike's friends, Tom and Lucy are here, too. They are playing video games. Many things are on the bed. It's messy(凌乱的). The coat is Mike's. The T-shirt and the socks are Tom's. There is a red cap. It must be Lucy's.
2.多选题- (共1题)
6.
如图,一理想变压器原、副线圈的匝数之比n1:n2=10:1。原线圈通过一理想电流表A接正弦交流电源,一个二极管和阻值为R的负载电阻串联后接到副线圈的两端;假设该二极管的正向电阻为零相当于导线,反向电阻为无穷大相当于断路;a、b间输入交流电瞬时值的表达式为
。则:



A.用电压表测得R两端电压为![]() |
B.增大负载电阻的阻值R,电流表的读数变小 |
C.负载电阻的阻值越大,cd间的电压Ucd越小 |
D.将二极管用导线短路,电流表的读数加倍 |
3.解答题- (共1题)
试卷分析
-
【1】题量占比
选择题:(5道)
多选题:(1道)
解答题:(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:0
5星难题:0
6星难题:2
7星难题:0
8星难题:0
9星难题:0