Solving a problem in physics section 1 point 18 electro

18. The flat capacitor plate of 16x16 cm and spacing d = 4 mm is attached to the battery terminals with the emf. equal to 250V. The space between the plates at a constant speed V = 3 mm / s slid glass plate having a thickness of 4 mm. What is the current I will go through the circuit? The dielectric constant ? = 7 glass.