An insulated copper wire of `100 ` turns is wrapped around a wooden cylindrical core of the cross- sectional area `24 cm^2`. The two ends of the wire are connected to a resistor. The total resistance in the circuit is `12Omega cm^2`. The two ends of the wire are connected to a resistor. The total resistance inthe circuit is `12 Omega` If an externally applied unifrom magnetic field in the core along its axis change from `1.5` T in one direction to `1.5` T in the opposite direction , the charge flowing through a point in the circuit during the change of magnetic field will be ____mC.