The magnetic flux linked with a coil at any instant 't' is given by φ=5 t^3-100 t+300 (SI unit). The emf induced in the coil at t =2 s is \ \ \ \ V.

The magnetic flux linked with a coil at any instant 't' is given by $\displaystyle \phi=5 t^3-100 t+300$ (SI unit). The emf induced in the coil at $\displaystyle \mathrm{t}=2 \mathrm{~s}$ is \_\_\_\_ V.