A sparker used to ignite lighter fluid in a barbeque grill is shown in Figure P18.60. Yo...

A sparker used to ignite lighter fluid in a barbeque grill is shown in Figure P18.60. You compress a knob at the end of the sparker. This compresses a spring, which when released moves a magnet at the end of the knob quickly into a 200- turn coil. The change in flux through the coil induces an emf that causes a spark across the 0.10-mm gap at the end of the sparker. (a) Estimate the time interval needed for the change in flux in order to produce this spark. Indicate any assumptions you made. (b) Is this a realistic process? Explain.