A Long Solenoid Has a Radius of 4

Multiple Choice

A long solenoid has a radius of 4.0 cm and has 800 turns/m. If the current in the solenoid is increasing at the rate of 3.0 A/s, what is the magnitude of the induced electric field at a point 2.2 cm from the axis of the solenoid?

A) 3.3 × 10−⁵ V/m
B) 3.6 × 10−⁵ V/m
C) 3.9 × 10−⁵ V/m
D) 4.2 × 10−⁵ V/m
E) 6.0 × 10−⁵ V/m