Electromagnetic Induction and Alternating Currents: JEE Main 2026 Physics question

A 30 cm long solenoid has 10 turns per cm and area of 5 cm$^2$. The current through the solenoid coil varies from 2 A to 4 A in 3.14 s. The e.m.f. induced in the coil is $\alpha\times10^{-5}$ V. The value $\alpha$ is ______.