A length of copper wire is shaped into a single circular loop of circumference 63 cm, similar to that shown in the picture below.

Question

A magnetic field of strength 0.50 T is parallel to the normal of the loop. The copper wire has a resistance of 2.5 x 10-2 Ω.
The ends of the wire loop are pulled suddenly so that the new circumference is reduced to 0.7 times its original circumference, in 400 ms.
Determine the magnitude of the induced current that flows in the copper wire.