Question1. Copper metal wire has a linear density of $0.010 \mathrm{~kg} / \mathrm{m}$. A sample of this wire is stretched horizontally in an area where the horizontal component of Earth's magnetic field of strength 0.000020 T passes through the wire at right angles. a) What current must be applied to the wire if the weight of the entire wire is supported by the mangetic force? (3 marks) b) If this current is applied, what might happen to the wire? (1 mark)