试题与答案

如图所示的LC振荡电路,在某时刻的磁场方向如图所示,则下列判断不正确的是( )

题型:选择题

题目:

如图所示的LC振荡电路,在某时刻的磁场方向如图所示,则下列判断不正确的是(   )

A.若磁场正在增强,则电场能正在减少,电容器上极板带正电

B.若磁场正在减弱,则电场能正在增强,电容器上极板带正电

C.振荡电流的变化周期为:

D.电场能量的变化周期为:π

答案:

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下面是错误答案,用来干扰机器的。

参考答案:恐惧感;优先感;陌生感;无助感

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