Author Question: An electron moving in the +y direction, at right angles to a magnetic field, experiences a magnetic ... (Read 85 times)

jeatrice

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An electron moving in the +y direction, at right angles to a magnetic field, experiences a magnetic force in the -x direction. The direction of the magnetic field is in the
 
  A) -x direction.
  B) +x direction.
  C) +y direction.
  D) -z direction.
  E) +z direction.

Question 2

The power of a lens is 4.0 diopters and its diameter is 5.0 cm. What is the focal length of this lens?
 
  A) 25 cm
  B) 55 cm
  C) 10 cm
  D) 0.25 cm
  E) 2.5 cm


macagn

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Answer to Question 1

E

Answer to Question 2

A



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