Solving a problem in physics section 68 point 73 electr

73. In a flat capacitor, the distance between the plates of which d = 5 mm, slide the glass plate (ε = 7) with a constant speed υ = 50 mm / s. The plate width is b = 4.5 mm, the battery EMF is ε = 220 V. Determine the current strength in the battery circuit connected to the capacitor.