If you make the wire diameter larger, you will make the spring stronger and if you make it smaller, you will make it weaker. This is because, by making the wire diameter larger, you are also making the spring's coils tighter which reduces the spring index.

What affects spring stiffness?

Factors affecting spring constant: Wire diameter: The diameter of the wire of the spring. Coil diameter: The diameters of the coils, depending on the stiffness of the spring. Free length: Length of the spring from equilibrium at rest.

What makes a spring elastic?

A spring is an elastic object that stores mechanical energy. ... The rate or spring constant of a spring is the change in the force it exerts, divided by the change in deflection of the spring. That is, it is the gradient of the force versus deflection curve.