Physics honors Induction test 1) A wire 25cm long carries a 12A current from east to west. The Earth's Magnetic field at the wire's location has a magnitude of 4.8*10-5T and is directed from south to north. a) What is the magnitude of the magnetic force on the wire? b) What is the direction of the force on the wire? 2) If the magnetic field is going into the page and we allow an electron to move through the field as if it was going to the top of the page, a) What is the direction of the electromagnetic force? b) What will the magnitude of the force equivalent to? A proton is in a uniform 0.25T magnetic field. The Proton moves in a clockwise circle with tangential speed of 2.8*105m/s. What is the direction of the magnetic field? How do you know? What is the radius of the circle the proton creates