PHYSICS 208 MIDTERM 2 EXAM QUESTIONS AND ANSWERS.

PHYSICS 208 MIDTERM 2 EXAM QUESTIONS AND ANSWERS
Which charges obey right hand rule? - CORRECT ANSWER✅✅positive charges



What is the magnetic field for a loop/circle? - CORRECT ANSWER✅✅B = (u0)(I)/2R



True or False: The magnetic field inside a solenoid is more uniform than for one loop - CORRECT
ANSWER✅✅True



Dimagnetic - CORRECT ANSWER✅✅weak decrease in magnetic field; Km < 1



Paramagnetic - CORRECT ANSWER✅✅weak increase in magnetic field; Km > 1



Ferromagnetic - CORRECT ANSWER✅✅strong increase in magnetic field; Km >> 1



When is the emf induced by a change in the magnetic field the greatest? - CORRECT ANSWER✅✅When
the loop area is perpendicular to the magnetic field



What is an eddy current? - CORRECT ANSWER✅✅a current that opposes the change in the magnetic
field



What is displacement current? - CORRECT ANSWER✅✅current that goes "through" the capacitor and is
the source of the magnetic field between plates



What is the unit of magnetic flux? - CORRECT ANSWER✅✅a webber (Wb)



What is the unit of inductance? - CORRECT ANSWER✅✅Henry (H)



Mutual Inductance for a Solenoid - CORRECT ANSWER✅✅M = (u0)(A)(N1)(N2)/(l1)