皮皮学，免费搜题
登录
搜题
【单选题】
—Is your brother at home? —No. He _______ the library. [ ]A.
was going to
B.
has been to
C.
has gone to
D.
went to
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】交流接触器常用于远距离接通和分断( )的电路。
A.
电压至380V、电流至 1 0A
B.
电压至1140V、电流至30A
C.
电压至1140V、电流至1000A
D.
电压至380V、电流至1000A
【单选题】The current flowing in a long thin solenoid is linearly increasing.
A.
The induced electric field exists only inside the solenoid.
B.
The induced electric field exists only outside the solenoid.
C.
The induced electric field exists both inside and outside the solenoid.
D.
No induced electric field exists both inside and outside the solenoid.
【单选题】A solenoid is 3.0 cm long and has a radius of 0.50 cm. It is wrapped with 500 turns of wire carrying a current of 2.0A. The magnetic field at the center of the solenoid is:
A.
9.9 × T
B.
1.3 × T
C.
4.2 × T
D.
10 T
【单选题】A small planar loop is placed inside a straight solenoid. When the angle between the normal direction of the loop and the axis of the solenoid is gradually increased from 0to 90 degree, how does the m...
A.
Does not change.
B.
Increases.
C.
Decreases.
D.
Decreases first and then increases.
相关题目：
参考解析：
知识点：
题目纠错 0
发布
