What Is the Radius of a Tightly Wound Solenoid of Circular

Multiple Choice

What is the radius of a tightly wound solenoid of circular cross-section that has 180 turns if a change in its internal magnetic field of 3.0 T/s causes a 6.0 A current to flow? The resistance of the circuit that contains the solenoid is 17 Ω.The only emf source for the circuit is the induced emf.

A) 0.25 m
B) 0.014 m
C) 0.54 m
D) 0.043 m