如图所示,图线a是线圈在匀强磁场中匀速转动时所产生正弦交流

  如图所示,图线a是线圈在匀强磁场中匀速转动时

所产生正弦交流电的图象,当调整线圈转速后,所

产生正弦交流电的图象如图线b所示,以下关于这

两个正弦交流电的说法正确的是       (    )

    A.在图中t = 0时刻穿过线圈的磁通量均为零

    B.线圈先后两次转速之比为3:2

    C.交流电a的瞬时值为V

    D.交流电b的最大值为V

 

答案

 BCD 根据并结合图像可选出选项BCD正确

 

相关题目

Isn’t it time you got down to________the papers? A.mark  B.be marked C.
Isn’t it time you got down to________the papers? A.mark  B.be marked C.being marked  D.marking  
(4分)为了确保用药安全,购买药品时,我们可以先看包装
(4分)为了确保用药安全,购买药品时,我们可以先看包装盒上的说明。下图是和胃整肠丸包装盒上的说明,请据图回答:(1)此药适合于治疗    
Is there a “success personality”? Some winning combination of qualities that
Is there a “success personality”? Some winning combination of qualities that leads almost naturally to achievement? If so, exactly what is that secret success formula, and can anyone develop it? A
f(x)=(1+x)+(1+x)2+(1+x)3+…+(1+x)10.(1)求f(x)展开式中x3的系数;(2)求f
f(x)=(1+x)+(1+x)2+(1+x)3+…+(1+x)10.(1)求f(x)展开式中x3的系数;(2)求f(x)展开式中各项系数之和.
用如图8所示的滑轮组来提升重物,已知物重为200N,人用125N
用如图8所示的滑轮组来提升重物,已知物重为200N,人用125N的力将物体在5秒内拉升2m,求:(1)人拉绳做的功和拉力的功率;(2)该滑轮组的机械效率
下列关于烷烃性质的叙述正确的是( ) A.烷烃分子中碳原子
下列关于烷烃性质的叙述正确的是( ) A.烷烃分子中碳原子不可能在同一平面上 B.烷烃易被酸性高锰酸钾溶液氧化 C.在光照条件下,烷烃易与溴水发
----Why are you late ? ----sorry, the bus I took ______ the mud for half an hour
----Why are you late ? ----sorry, the bus I took ______ the mud for half an hour, so I had to walk here. A. had stuck in  B. has stuck in  C. was stuck in  D. has been stuck in
在制备抗蛇毒毒素血清时,需将减毒的蛇毒注入马的体内,
在制备抗蛇毒毒素血清时,需将减毒的蛇毒注入马的体内,引起免疫反应,这一免疫反应和所用的蛇毒分别属于 ( ) A.非特异性免疫、抗原        

最新题目