@..A current of 50 A is established in a slab of 0.5cm thick and 2 cm wide. The slab is placed in a magnetic field B of 1.5T. The magnetic field is perpendicular to the plane of the slab and to the current. The free electron concentration in copper is 8.48 * 10 ^ 28 electron/ m ^ 3 What will be the magnitude of Hall voltage across the width of the slab..A current of 50 A is established in a slab of 0.5cm thick and 2 cm wide. The slab is placed in a magnetic field B of 1.5T. The magnetic field is perpendicular to the plane of the slab and to the current. The free electron concentration in copper is 8.48 * 10 ^ 28 electron/ m ^ 3 What will be the magnitude of Hall voltage across the width of the slab.