Does dragging slowly or quickly produce the largest voltage and brightest light? Why?

Which coil produced the largest voltage and brightest light in the bulb? Why?
Does dragging slowly or quickly produce the largest voltage and brightest light? Why?
Would switching the polarity of the magnet change your results? Why or why not?
Try switching the polarity of the magnet by pressing the button in the lower right. Are the results consistent with your answer to #2?