问题
选择题
如图是一正弦式交变电流的电压图象.从图象可知电压的最大值和频率分别为( )
A.10V,0.02s
B.10V,50Hz
C.10
V,0.02s2
D.102V,50Hz
答案
根据图象可知该交流电的电压最大值是Um=10V,
周期T=0.02s,所以频率为50Hz,故B正确
故选:B.
如图是一正弦式交变电流的电压图象.从图象可知电压的最大值和频率分别为( )
A.10V,0.02s
B.10V,50Hz
C.10
V,0.02s2
D.102V,50Hz
根据图象可知该交流电的电压最大值是Um=10V,
周期T=0.02s,所以频率为50Hz,故B正确
故选:B.