6. In a magnetic material, the ratio of the flux linkage through the loop to its loop current is ( ) A: Permeability B: Mutual inductance C: flux D: self-inductance

1.Inaseriescircuit,whichvaluewillremainunchangedatallplacesinthecircuit. A: Voltage B: Current C: Resistance D: Inductance

The inductance of an electric device is independent of the electric current it carries. A: 正确 B: 错误

The mirror test is used to investigate children’s recognition of ( ). A: Spiritual self B: Subjective self C: Material self D: Objective self

Whichis the unit of inductance？( ) A: Farad B: Henry C: Omega D: none of the above

以下程序的输出结果是（）。 classA: deffun1(self):print("fun1A") deffun2(self):print("fun2A") classB(A): deffun1(self):print("fun1B") deffun3(self):print("fun2B") b=B() b.fun1() b.fun2() a=A() a.fun1() a.fun2()

self表示

The inductor voltage phase lags its current by 90 o, and the capacitor current lags its voltage by 90 o, is this conclusion true? [ ]. A: It's impossible. B: When the capacitance and inductance are nonlinear components. C: When inductance current and voltage, capacitance current and voltage are not related direction. D: Whenever.

Two inductors in series. Given L1=3mH and L2=6mH .the total inductance is ( )mH. A: 2 B: 4 C: 9

class Student:def __init__(self,name,age):self.name=nameself.age=agedef fun1(self):print("hello")（ ）def fun2(self):print("yes")child=Child("Tom",20)child.fun1()