Answer Happy

17. An electron is travelling in the positive x direction. A uniform electric field Ē is in the negative y direction. If a uniform magnetic field with the appropriate magnitude and direction also exists in the region, the total force on the electron will be zero. The appropriate direction for the magetic field is: A) the positive y direction B) the negative y direction C) into the page D) out of the page E) the negative x direction 18. I weber is the same as: A) 1 V/s B) 1 T/s C) 1 t/m D) IT.m E) 1 T/m2 19. Faraday's law states that an induced emf is proportional to: A) the rate of change of the magnetic field B) the rate of change of the electric field C) the rate of change of the magnetic flux D) the rate of change of the electric flux E) zero 20. A square loop of wire lies in the plane of the page. A decreasing magnetic field is directed into the page. The induced current in the loop is: A) counterclockwise B) clockwise C) zero D) up the left edge and from right to left alongthe top edge E) throught the middle of the page