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

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

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

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

The working principle of EPC-400 water content sensor is the___ with water content change. A: capacitance alternation B: esistance alternation C: temperature alternation D: inductance alternation