【单选题】As shown in the circuit, the circuit is in a steady state before the switch K is opened, and the switch K is turned on at t=0. The initial vlotage value of the inductance u(0+) is equal to ________.Ch...
【单选题】As shown in the circuit, the circuit has been in a steady state before the switch is opened, and the switch is turned on at t=0. The initial voltage value of the resistor of 2Ω is u(0+)=________V. Cho...