A long straight wire carries a 2.0 A current. A small rectangular coil of dimensions 5.0 ~cm 4.0 ~cm is placed at a distance of 2.0 m from the wire. The wire is in the same plane as the coil. The coil has n=250 turns. Assume that the magnetic field due to the current is uniform over the coil. Then

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1. Athe mutual inductance between the wire and the coil will be doubled if the current in the wire is doubled.
2. Bthe magnitude of the magnetic field due to the wire at the coil is 2.0 10⁻⁷ ~T .
3. Cthe mutual inductance between the wire and the coil will be doubled if the coil is placed at a distance of 1.0
4. Dthe mutual inductance between the wire and the coil is proportional to n .