A generator consisting of a circular conducting loop with a radius $1\mathrm{.}0$ m rotates in a uniform magnetic field. The induced emf has the time dependence shown in the graph.

What is the strength of the magnetic field in which the loop rotates.

$2\mathrm{.}99$ T

$2\mathrm{.}4$ T

$1\mathrm{.}9$ T

$7\mathrm{.}5$ T

$0\mathrm{.}5$ T