Question

16. concave mirror has a radius of curvature of 60.0 cm: How close to the mirror should an object be placed so that the rays travel parallel to each other after reflection? A) 10.0 cm 15.0 cm 8) 30.0 cm D) 45.0 cm E) 60.0 cm 17 An electron traveling horizontally enters a region where a uniform magnetic field is directed into the plane of the paper Which one of the following phrases most accurately describes the motion of the electron once it has entered the field? A. upward and parabolic B upward and circular C. downward and circular D. upright; along straight line E: downward and parabolic 18 metal ring is held at rest below bar magnet that is moving toward the ring as suggested in the figure_ An observer views the ring from above: Which one of the following statements concerning this situation is true? A: As the magnet moves an induced current will flow counterclockwise as viewed by the observer: B. As the magnet moves_ an induced current will flow clockwise as viewed by the observer: C.As the magnet moves, there is no induced current in the ring: D. If the magnet is stationary, an induced voltage will OCCur; but no induced current E: All of the above are False_

          16. concave mirror has a radius of curvature of 60.0 cm: How close to the mirror should an object be placed so that the rays travel parallel to each other after reflection? A) 10.0 cm 15.0 cm 8) 30.0 cm D) 45.0 cm E) 60.0 cm
17 An electron traveling horizontally enters a region where a uniform magnetic field is directed into the plane of the paper Which one of the following phrases most accurately describes the motion of the electron once it has entered the field?
A. upward and parabolic B upward and circular C. downward and circular D. upright; along straight line E: downward and parabolic
18 metal ring is held at rest below bar magnet that is moving toward the ring as suggested in the figure_ An observer views the ring from above: Which one of the following statements concerning this situation is true?
A: As the magnet moves an induced current will flow counterclockwise as viewed by the observer: B. As the magnet moves_ an induced current will flow clockwise as viewed by the observer: C.As the magnet moves, there is no induced current in the ring: D. If the magnet is stationary, an induced voltage will OCCur; but no induced current E: All of the above are False_

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