Em |
R |
Im | ||
|
Em | ||
|
BωS | ||
|
B×2πn×
| ||
|
π2L2nB | ||
|
π2L2nB | ||
|
1 |
4 |
π2L2nB | ||
|
T |
4 |
π2L2nB | ||
|
1 |
4 |
2π |
2πn |
π4B2L4n |
8R |
1 |
4 |
1 |
2 |
. |
I |
| ||
R |
| ||
R |
△∅ |
R |
πBL2 |
2R |
π2L2nB | ||
|
1 |
4 |
π4B2L4n |
8R |
1 |
4 |
πBL2 |
2R |
A.400V,0.02s | B.200V,0.02s | C.400V,0.08s | D.200V,0.08s |
A.t=0时线圈的感应电动势为零 | ||
B.转过90°时线圈的感应电动势最大 | ||
C.转过90°的过程中线圈中的平均感应电动势为
| ||
D.转过90°的过程中线圈中的平均感应电动势为
|
A.穿过线圈的磁通量最大,线圈中的感应电动势最大 |
B.穿过线圈的磁通量为零,线圈中的感应电动势为零 |
C.穿过线圈的磁通量为零,线圈中的感应电动势最大 |
D.穿过线圈的磁通量最大,线圈中的感应电动势为零 |
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