For a Long Ideal Solenoid Having a Circular Cross-Section,the Magnetic

Multiple Choice

For a long ideal solenoid having a circular cross-section,the magnetic field strength within the solenoid is given by the equation B(t) = 5.0t T,where t is time in seconds.If the induced electric field outside the solenoid is 1.1 V/m at a distance of 2.0 m from the axis of the solenoid,find the radius of the solenoid.

A) 0.30 m
B) 77 m
C) 0.94 m
D) 9.0 m