1 |
2 |
nBSω | ||
|
E |
r+R |
| ||
2 |
nBSω |
R+r |
| ||
2 |
nBSω |
R+r |
2π |
ω |
πNn2B2S2ωr |
(r+R)2 |
| ||
2 |
nBSω |
R+r |
πNn2B2S2ωr |
(r+R)2 |
A.
| B.
| ||||||||||||||
C.
| D.
|
A.Emsinωt | B.2Emsin(2ωt) | C.Emsin(2ωt) | D.2Emsinωt |
NBSω |
R+r |
NBSω | ||
|
| ||
2(R+r) |
A.②③ | B.②④ | C.③④ | D.①④ |
A.使线圈匝数增加一倍 |
B.使线圈面积增加一倍 |
C.使线圈匝数减少一半 |
D.使磁感应强度的变化率增大一倍 |
© 2017-2019 超级试练试题库,All Rights Reserved.