The Current Flowing in a 20-Cm Long and 2-Cm Radius

The current flowing in a 20-cm long and 2-cm radius solenoid having 500 turns decreases from 3 A to 1 A in 0.1 seconds.Determine the magnitude of the induced electric field inside the solenoid 1-cm from its center.

A) 5 * 10^-1 V/m
B) 5 * 10^{-4 V/m}
C) 3 * 10^{-4 V/m}
D) 3 * 10^{-2 V/m}