Chapter 19 - Magnetism - Learning Path Questions and Exercises - Conceptual Questions - Page 689: 15

When a large current passes through the length of a spring, it shortens because the coils of the spring because the coils of the spring attract each other due to the magnetic fields created in the coils .i.e. parallel wires with current in same direction will attract each other.

When a large current passes through the length of a spring, it shortens because the coils of the spring because the coils of the spring attract each other due to the magnetic fields created in the coils .i.e. parallel wires with current in same direction will attract each other.