... inductor changes, creating a time-varying magnetic field inside the coil, a voltage is induced, ... to the inductor will have near-field coupling to the inductor's magnetic field, which may cause additional ... cassette player 4) PC power supply 5) Monitor,audio,VCD,DCD 6) UPS 7) The electronic ... LED the driver, backlighting devices, charger, car audio .Be able to design and manufacture under customer ...