A solenoid of n=100 turns per centimeterhas a current i running in it suchthat the resulting magnetic field is B=1T.
a) Find the magnitude of the currenti.
b) Draw a solenoid, and assume a direction for thecurrent; then draw the direction of the resulting B according to thedirection of i.
c) Assume now that the solenoid is immersed in an externalmagnetic field Bext=2 T. Determine the induced emf (if any) caused bythis external magnetic field. Explain your answer.