Assertion:- Materials can be streched even beyond proportionality limit. (point till which Hooke's law is valid is called proportionality limit)
Reason:- Elastic forces can be conservative even beyond proportional limit.

If a metal wire is stretched a little beyond its elastic limit (or yield point), and released, it will

If a metal wire is stretched a little beyond its elastic limit (or yield point), and released, it will

If a metal wire is stretched a little beyond its elastic limit (or yield point), and released, it will

If a metal wire is stretched a little beyond its elastic limit (or yield point), and released, it will

On applying external force beyond the elastic limit,

On applying external force beyond the elastic limit,

The metal which do not break beyond elastic limit is

Select the correct alternative(s) a) Elastic forces are always conservative b) Elastic forces are not always conservative c) Elastic forces are conservative only when Hooke's law is obeyed d) Elastic forces may be conservative even when Hooke's law is not obeyed

Assertion: The ion cannot move with a speed beyond a certain limit in a cyclotron. Reason: As velocity increases time taken by ion increases.