Em |
R+r |
nBSω |
R+r |
| ||
2 |
| ||
2 |
nBSω•R |
R+r |
| ||
2 |
nBSω |
R+r |
| ||
2 |
R |
2(R+r)2 |
| ||
2 |
. |
E |
△Φ |
△T |
. |
I |
| ||
R+r |
. |
I |
q |
△t |
| ||
2(r+R) |
nBSω |
R+r |
| ||
2 |
nBSω•R |
R+r |
| ||
2 |
nBSω |
R+r |
R |
2(R+r)2 |
| ||
2(r+R) |
A.当线圈平面与磁感线平行时,线圈中电流强度为零 | ||||
B.电流有效值I=
| ||||
C.外力做功的平均功率P=
| ||||
D.当线圈平面与磁感线平行时开始转动90°过程中,通过电阻的电量为
|
A.图示位置线圈的感应电动势为NBSω | ||||
B.交流电流表的示数I=
| ||||
C.一个周期内通过R的电荷量q=
| ||||
D.R两端电压的有效值U=
|
A.2Bl1l2ωcosθ | B.3Bl1l2ωsinθ |
C.Bl1l2ωcosθ | D.Bl1l2ωsinθ |
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