A copper wire 3.0 m long and with a cross-sectional area of 0.050 cm2 is subjected to a tension of 84 N. Calculate (a) its elongation and (b) the force due to tension required to reach the elastic limit.

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?

When the magnetic domains in a material can be aligned, but eventually drift out of alignment, the material is