A closed coil having 20 turns, area of cross-section 1 cm2 and  negligible resistance are connected to a ballistic galvanometer of resistance 30 ohms. If the normal of the coil is inclined at 60o to the direction of a magnetic field of intensity 1.5 Wb/m2, the coil is quickly pulled out of the field to a region of zero magnetic field, the charge (in μC) passed through the galvanometer is ______.